diff --git a/TODO.md b/TODO.md
index 27d2c50b..b470c465 100644
--- a/TODO.md
+++ b/TODO.md
@@ -257,8 +257,6 @@ https://code.djangoproject.com/ticket/24576
 + Query Expressions, Conditional Expressions, and Database Functions¶
 * forms: You can now pass a callable that returns an iterable of choices when instantiating a ChoiceField.
 
-* migrate to DRF3.x
-
 * move all tests to django-orchestra/tests
 * *natural keys: those fields that uniquely identify a service, list.name, website.name, webapp.name+account, make sure rest api can not edit thos things
 
@@ -287,3 +285,24 @@ https://code.djangoproject.com/ticket/24576
 
 # Determine the difference between data serializer used for validation and used for the rest API!
 # Make PluginApiView that fills metadata and other stuff like modeladmin plugin support
+
+# @classmethods do not need to be called with type(object)!
+
+# Deprectae widgets.showtext and readonlyField by ReadOnlyFormMixin
+
+# custom validation for settings
+# TODO orchestra related services code reload: celery/uwsgi reloading find aonther way without root and implement reload
+# insert settings on dashboard dynamically
+
+# rename "edit settings" -> change settings
+
+# View settings file
+contrib/orders/models.py:        if type(instance) in services:
+contrib/orders/models.py:        if type(instance) in services:
+contrib/orders/helpers.py:            if type(node) in services:
+contrib/bills/admin.py:            return [inline for inline in inlines if type(inline) is not BillLineInline]
+contrib/bills/admin.py:        return [inline for inline in inlines if type(inline) is not ClosedBillLineInline]
+contrib/accounts/actions.py.save:                if type(service) in registered_services:
+contrib/accounts/actions.py:                if type(service) in registered_services:
+permissions/options.py:        for func in inspect.getmembers(type(self), predicate=inspect.ismethod):
+
diff --git a/orchestra/admin/__init__.py b/orchestra/admin/__init__.py
index 8885990f..75b17e58 100644
--- a/orchestra/admin/__init__.py
+++ b/orchestra/admin/__init__.py
@@ -1,2 +1,32 @@
-from .options import *
+from functools import update_wrapper
+
+from django.contrib.admin import site
+
 from .dashboard import *
+from .options import *
+
+
+# monkey-patch admin.site in order to porvide some extra admin urls
+
+urls = []
+def register_url(pattern, view, name=""):
+    global urls
+    urls.append((pattern, view, name))
+site.register_url = register_url
+
+
+site_get_urls = site.get_urls
+def get_urls():
+    def wrap(view, cacheable=False):
+        def wrapper(*args, **kwargs):
+            return site.admin_view(view, cacheable)(*args, **kwargs)
+        wrapper.admin_site = site
+        return update_wrapper(wrapper, view)
+    global urls
+    extra_patterns = []
+    for pattern, view, name in urls:
+        extra_patterns.append(
+            url(pattern, wrap(view), name=name)
+        )
+    return site_get_urls() + extra_patterns
+site.get_urls = get_urls
diff --git a/orchestra/admin/dashboard.py b/orchestra/admin/dashboard.py
index 03586b66..6e79015a 100644
--- a/orchestra/admin/dashboard.py
+++ b/orchestra/admin/dashboard.py
@@ -1,20 +1,31 @@
-from django.conf import settings
+from fluent_dashboard import dashboard
+from fluent_dashboard.modules import CmsAppIconList
 
 from orchestra.core import services
 
 
-def generate_services_group():
-    models = []
-    for model, options in services.get().items():
-        if options.get('menu', True):
-            models.append("%s.%s" % (model.__module__, model._meta.object_name))
-    
-    settings.FLUENT_DASHBOARD_APP_GROUPS += (
-        ('Services', {
-            'models': models,
-            'collapsible': True,
-        }),
-    )
-
-
-generate_services_group()
+class OrchestraIndexDashboard(dashboard.FluentIndexDashboard):
+    def get_application_modules(self):
+        modules = super(OrchestraIndexDashboard, self).get_application_modules()
+        models = []
+        for model, options in services.get().items():
+            if options.get('menu', True):
+                models.append("%s.%s" % (model.__module__, model._meta.object_name))
+        
+        # TODO make this dynamic
+        for module in modules:
+            if module.title == 'Administration':
+                module.children.append({
+                    'models': [{
+                        'add_url': '/admin/settings/',
+                        'app_name': 'settings',
+                        'change_url': '/admin/settings/setting/',
+                        'name': 'setting',
+                        'title': "Settings" }],
+                   'name': 'settings',
+                   'title': 'Settings',
+                   'url': '/admin/settings/'
+                })
+        service_icon_list = CmsAppIconList('Services', models=models, collapsible=True)
+        modules.append(service_icon_list)
+        return modules
diff --git a/orchestra/admin/forms.py b/orchestra/admin/forms.py
index 548bb688..b453c9f0 100644
--- a/orchestra/admin/forms.py
+++ b/orchestra/admin/forms.py
@@ -47,8 +47,7 @@ class AdminFormSet(BaseModelFormSet):
 
 
 def adminmodelformset_factory(modeladmin, form, formset=AdminFormSet, **kwargs):
-    formset = modelformset_factory(modeladmin.model, form=form, formset=formset,
-            **kwargs)
+    formset = modelformset_factory(modeladmin.model, form=form, formset=formset, **kwargs)
     formset.modeladmin = modeladmin
     return formset
 
diff --git a/orchestra/admin/menu.py b/orchestra/admin/menu.py
index a776611d..bb1e1c75 100644
--- a/orchestra/admin/menu.py
+++ b/orchestra/admin/menu.py
@@ -59,6 +59,9 @@ def get_accounts():
 
 def get_administration_items():
     childrens = []
+    if isinstalled('orchestra.contrib.settings'):
+        url = reverse('admin:settings_edit_settings')
+        childrens.append(items.MenuItem(_("Settings"), url))
     if isinstalled('orchestra.contrib.services'):
         url = reverse('admin:services_service_changelist')
         childrens.append(items.MenuItem(_("Services"), url))
diff --git a/orchestra/conf/base_settings.py b/orchestra/conf/base_settings.py
index f965df1d..17ad8178 100644
--- a/orchestra/conf/base_settings.py
+++ b/orchestra/conf/base_settings.py
@@ -114,6 +114,8 @@ INSTALLED_APPS = (
     
     # Last to load
     'orchestra.contrib.resources',
+    'orchestra.contrib.settings',
+
 )
 
 
@@ -139,7 +141,7 @@ ADMIN_TOOLS_MENU = 'orchestra.admin.menu.OrchestraMenu'
 
 # Fluent dashboard
 # TODO subclass like in admin_tools_menu
-ADMIN_TOOLS_INDEX_DASHBOARD = 'fluent_dashboard.dashboard.FluentIndexDashboard'
+ADMIN_TOOLS_INDEX_DASHBOARD = 'orchestra.admin.dashboard.OrchestraIndexDashboard'
 FLUENT_DASHBOARD_ICON_THEME = '../orchestra/icons'
 
 FLUENT_DASHBOARD_APP_GROUPS = (
@@ -204,6 +206,7 @@ FLUENT_DASHBOARD_APP_ICONS = {
     'issues/ticket': 'Ticket_star.png',
     'miscellaneous/miscservice': 'Misc-Misc-Box-icon.png',
     # Administration
+    'settings/setting': 'preferences.png',
     'djcelery/taskstate': 'taskstate.png',
     'orchestration/server': 'vps.png',
     'orchestration/route': 'hal.png',
diff --git a/orchestra/contrib/accounts/settings.py b/orchestra/contrib/accounts/settings.py
index 67781676..81ab8ac8 100644
--- a/orchestra/contrib/accounts/settings.py
+++ b/orchestra/contrib/accounts/settings.py
@@ -1,10 +1,10 @@
 from django.conf import settings
 from django.utils.translation import ugettext_lazy as _
 
-from orchestra.settings import ORCHESTRA_BASE_DOMAIN
+from orchestra.settings import ORCHESTRA_BASE_DOMAIN, Setting
 
 
-ACCOUNTS_TYPES = getattr(settings, 'ACCOUNTS_TYPES', (
+ACCOUNTS_TYPES = Setting('ACCOUNTS_TYPES', (
     ('INDIVIDUAL', _("Individual")),
     ('ASSOCIATION', _("Association")),
     ('CUSTOMER', _("Customer")),
@@ -15,32 +15,26 @@ ACCOUNTS_TYPES = getattr(settings, 'ACCOUNTS_TYPES', (
 ))
 
 
-ACCOUNTS_DEFAULT_TYPE = getattr(settings, 'ACCOUNTS_DEFAULT_TYPE',
-    'INDIVIDUAL'
-)
+ACCOUNTS_DEFAULT_TYPE = Setting('ACCOUNTS_DEFAULT_TYPE', 'INDIVIDUAL', choices=ACCOUNTS_TYPES)
 
 
-ACCOUNTS_LANGUAGES = getattr(settings, 'ACCOUNTS_LANGUAGES', (
+ACCOUNTS_LANGUAGES = Setting('ACCOUNTS_LANGUAGES', (
     ('EN', _('English')),
 ))
 
 
-ACCOUNTS_SYSTEMUSER_MODEL = getattr(settings, 'ACCOUNTS_SYSTEMUSER_MODEL',
+ACCOUNTS_DEFAULT_LANGUAGE = Setting('ACCOUNTS_DEFAULT_LANGUAGE', 'EN', choices=ACCOUNTS_LANGUAGES)
+
+
+ACCOUNTS_SYSTEMUSER_MODEL = Setting('ACCOUNTS_SYSTEMUSER_MODEL',
     'systemusers.SystemUser'
 )
 
 
-ACCOUNTS_DEFAULT_LANGUAGE = getattr(settings, 'ACCOUNTS_DEFAULT_LANGUAGE',
-    'EN'
-)
+ACCOUNTS_MAIN_PK = Setting('ACCOUNTS_MAIN_PK', 1)
 
 
-ACCOUNTS_MAIN_PK = getattr(settings, 'ACCOUNTS_MAIN_PK',
-    1
-)
-
-
-ACCOUNTS_CREATE_RELATED = getattr(settings, 'ACCOUNTS_CREATE_RELATED', (
+ACCOUNTS_CREATE_RELATED = Setting('ACCOUNTS_CREATE_RELATED', (
     # <model>, <key field>, <kwargs>, <help_text>
     ('mailboxes.Mailbox',
         'name',
@@ -60,6 +54,6 @@ ACCOUNTS_CREATE_RELATED = getattr(settings, 'ACCOUNTS_CREATE_RELATED', (
 ))
 
 
-ACCOUNTS_SERVICE_REPORT_TEMPLATE = getattr(settings, 'ACCOUNTS_SERVICE_REPORT_TEMPLATE',
+ACCOUNTS_SERVICE_REPORT_TEMPLATE = Setting('ACCOUNTS_SERVICE_REPORT_TEMPLATE',
     'admin/accounts/account/service_report.html'
 )
diff --git a/orchestra/contrib/bills/actions.py b/orchestra/contrib/bills/actions.py
index ce638b5a..ef85f59c 100644
--- a/orchestra/contrib/bills/actions.py
+++ b/orchestra/contrib/bills/actions.py
@@ -56,7 +56,7 @@ def close_bills(modeladmin, request, queryset):
     for bill in queryset:
         if not validate_contact(request, bill):
             return
-    SelectSourceFormSet = adminmodelformset_factory(modeladmin, SelectSourceForm, extra=0)
+    SelectSourceFormSet = adminmodelformset_factory(SelectSourceForm, modeladmin, extra=0)
     formset = SelectSourceFormSet(queryset=queryset)
     if request.POST.get('post') == 'generic_confirmation':
         formset = SelectSourceFormSet(request.POST, request.FILES, queryset=queryset)
diff --git a/orchestra/contrib/bills/settings.py b/orchestra/contrib/bills/settings.py
index 76dbef13..b80d606e 100644
--- a/orchestra/contrib/bills/settings.py
+++ b/orchestra/contrib/bills/settings.py
@@ -1,99 +1,97 @@
 from django.conf import settings
 from django_countries import data
 
-from orchestra.settings import ORCHESTRA_BASE_DOMAIN
+from orchestra.settings import ORCHESTRA_BASE_DOMAIN, Setting
 
 
-BILLS_NUMBER_LENGTH = getattr(settings, 'BILLS_NUMBER_LENGTH',
-    4
-)
+BILLS_NUMBER_LENGTH = Setting('BILLS_NUMBER_LENGTH', 4)
 
 
-BILLS_INVOICE_NUMBER_PREFIX = getattr(settings, 'BILLS_INVOICE_NUMBER_PREFIX',
+BILLS_INVOICE_NUMBER_PREFIX = Setting('BILLS_INVOICE_NUMBER_PREFIX',
     'I'
 )
 
 
-BILLS_AMENDMENT_INVOICE_NUMBER_PREFIX = getattr(settings, 'BILLS_AMENDMENT_INVOICE_NUMBER_PREFIX',
+BILLS_AMENDMENT_INVOICE_NUMBER_PREFIX = Setting('BILLS_AMENDMENT_INVOICE_NUMBER_PREFIX',
     'A'
 )
 
 
-BILLS_FEE_NUMBER_PREFIX = getattr(settings, 'BILLS_FEE_NUMBER_PREFIX',
+BILLS_FEE_NUMBER_PREFIX = Setting('BILLS_FEE_NUMBER_PREFIX',
     'F'
 )
 
 
-BILLS_AMENDMENT_FEE_NUMBER_PREFIX = getattr(settings, 'BILLS_AMENDMENT_FEE_NUMBER_PREFIX',
+BILLS_AMENDMENT_FEE_NUMBER_PREFIX = Setting('BILLS_AMENDMENT_FEE_NUMBER_PREFIX',
     'B'
 )
 
 
-BILLS_PROFORMA_NUMBER_PREFIX = getattr(settings, 'BILLS_PROFORMA_NUMBER_PREFIX',
+BILLS_PROFORMA_NUMBER_PREFIX = Setting('BILLS_PROFORMA_NUMBER_PREFIX',
     'P'
 )
 
 
-BILLS_DEFAULT_TEMPLATE = getattr(settings, 'BILLS_DEFAULT_TEMPLATE',
+BILLS_DEFAULT_TEMPLATE = Setting('BILLS_DEFAULT_TEMPLATE',
     'bills/microspective.html'
 )
 
 
-BILLS_FEE_TEMPLATE = getattr(settings, 'BILLS_FEE_TEMPLATE',
+BILLS_FEE_TEMPLATE = Setting('BILLS_FEE_TEMPLATE',
     'bills/microspective-fee.html'
 )
 
 
-BILLS_PROFORMA_TEMPLATE = getattr(settings, 'BILLS_PROFORMA_TEMPLATE',
+BILLS_PROFORMA_TEMPLATE = Setting('BILLS_PROFORMA_TEMPLATE',
     'bills/microspective-proforma.html'
 )
 
 
-BILLS_CURRENCY = getattr(settings, 'BILLS_CURRENCY',
+BILLS_CURRENCY = Setting('BILLS_CURRENCY',
     'euro'
 )
 
 
-BILLS_SELLER_PHONE = getattr(settings, 'BILLS_SELLER_PHONE',
+BILLS_SELLER_PHONE = Setting('BILLS_SELLER_PHONE',
     '111-112-11-222'
 )
 
 
-BILLS_SELLER_EMAIL = getattr(settings, 'BILLS_SELLER_EMAIL',
+BILLS_SELLER_EMAIL = Setting('BILLS_SELLER_EMAIL',
     'sales@{}'.format(ORCHESTRA_BASE_DOMAIN)
 )
 
 
-BILLS_SELLER_WEBSITE = getattr(settings, 'BILLS_SELLER_WEBSITE',
+BILLS_SELLER_WEBSITE = Setting('BILLS_SELLER_WEBSITE',
     'www.{}'.format(ORCHESTRA_BASE_DOMAIN)
 )
 
 
-BILLS_SELLER_BANK_ACCOUNT = getattr(settings, 'BILLS_SELLER_BANK_ACCOUNT',
+BILLS_SELLER_BANK_ACCOUNT = Setting('BILLS_SELLER_BANK_ACCOUNT',
     '0000 0000 00 00000000 (Orchestra Bank)'
 )
 
 
-BILLS_EMAIL_NOTIFICATION_TEMPLATE = getattr(settings, 'BILLS_EMAIL_NOTIFICATION_TEMPLATE',
+BILLS_EMAIL_NOTIFICATION_TEMPLATE = Setting('BILLS_EMAIL_NOTIFICATION_TEMPLATE',
     'bills/bill-notification.email'
 )
 
 
-BILLS_ORDER_MODEL = getattr(settings, 'BILLS_ORDER_MODEL',
+BILLS_ORDER_MODEL = Setting('BILLS_ORDER_MODEL',
     'orders.Order'
 )
 
 
-BILLS_CONTACT_DEFAULT_CITY = getattr(settings, 'BILLS_CONTACT_DEFAULT_CITY',
+BILLS_CONTACT_DEFAULT_CITY = Setting('BILLS_CONTACT_DEFAULT_CITY',
     'Barcelona'
 )
 
 
-BILLS_CONTACT_COUNTRIES = getattr(settings, 'BILLS_CONTACT_COUNTRIES',
-    ((k,v) for k,v in data.COUNTRIES.items())
+BILLS_CONTACT_COUNTRIES = Setting('BILLS_CONTACT_COUNTRIES', tuple((k,v) for k,v in data.COUNTRIES.items()),
+    editable=False
 )
 
 
-BILLS_CONTACT_DEFAULT_COUNTRY = getattr(settings, 'BILLS_CONTACT_DEFAULT_COUNTRY',
-    'ES'
+BILLS_CONTACT_DEFAULT_COUNTRY = Setting('BILLS_CONTACT_DEFAULT_COUNTRY', 'ES',
+    choices=BILLS_CONTACT_COUNTRIES
 )
diff --git a/orchestra/contrib/contacts/settings.py b/orchestra/contrib/contacts/settings.py
index adcfe84d..8f6fb6a3 100644
--- a/orchestra/contrib/contacts/settings.py
+++ b/orchestra/contrib/contacts/settings.py
@@ -1,8 +1,10 @@
 from django.conf import settings
 from django_countries import data
 
+from orchestra.settings import Setting
 
-CONTACTS_DEFAULT_EMAIL_USAGES = getattr(settings, 'CONTACTS_DEFAULT_EMAIL_USAGES', (
+
+CONTACTS_DEFAULT_EMAIL_USAGES = Setting('CONTACTS_DEFAULT_EMAIL_USAGES', (
     'SUPPORT',
     'ADMIN',
     'BILLING',
@@ -12,16 +14,13 @@ CONTACTS_DEFAULT_EMAIL_USAGES = getattr(settings, 'CONTACTS_DEFAULT_EMAIL_USAGES
 ))
 
 
-CONTACTS_DEFAULT_CITY = getattr(settings, 'CONTACTS_DEFAULT_CITY',
+CONTACTS_DEFAULT_CITY = Setting('CONTACTS_DEFAULT_CITY',
     'Barcelona'
 )
 
 
-CONTACTS_COUNTRIES = getattr(settings, 'CONTACTS_COUNTRIES', tuple(
-    ((k,v) for k,v in data.COUNTRIES.items())
-))
+CONTACTS_COUNTRIES = Setting('CONTACTS_COUNTRIES', tuple((k,v) for k,v in data.COUNTRIES.items()),
+    editable=False)
 
 
-CONTACTS_DEFAULT_COUNTRY = getattr(settings, 'CONTACTS_DEFAULT_COUNTRY',
-    'ES'
-)
+CONTACTS_DEFAULT_COUNTRY = Setting('CONTACTS_DEFAULT_COUNTRY', 'ES', choices=CONTACTS_COUNTRIES)
diff --git a/orchestra/contrib/databases/settings.py b/orchestra/contrib/databases/settings.py
index 21d2a47c..3b4d0d2d 100644
--- a/orchestra/contrib/databases/settings.py
+++ b/orchestra/contrib/databases/settings.py
@@ -1,17 +1,17 @@
 from django.conf import settings
 
+from orchestra.settings import Setting
 
-DATABASES_TYPE_CHOICES = getattr(settings, 'DATABASES_TYPE_CHOICES', (
+
+DATABASES_TYPE_CHOICES = Setting('DATABASES_TYPE_CHOICES', (
     ('mysql', 'MySQL'),
     ('postgres', 'PostgreSQL'),
 ))
 
 
-DATABASES_DEFAULT_TYPE = getattr(settings, 'DATABASES_DEFAULT_TYPE',
-    'mysql'
-)
+DATABASES_DEFAULT_TYPE = Setting('DATABASES_DEFAULT_TYPE', 'mysql', choices=DATABASES_TYPE_CHOICES)
 
 
-DATABASES_DEFAULT_HOST = getattr(settings, 'DATABASES_DEFAULT_HOST',
+DATABASES_DEFAULT_HOST = Setting('DATABASES_DEFAULT_HOST',
     'localhost'
 )
diff --git a/orchestra/contrib/domains/settings.py b/orchestra/contrib/domains/settings.py
index 058d042e..4d112655 100644
--- a/orchestra/contrib/domains/settings.py
+++ b/orchestra/contrib/domains/settings.py
@@ -1,109 +1,106 @@
 from django.conf import settings
 
-from orchestra.settings import ORCHESTRA_BASE_DOMAIN
+from orchestra.settings import ORCHESTRA_BASE_DOMAIN, Setting
 
 
-DOMAINS_DEFAULT_NAME_SERVER = getattr(settings, 'DOMAINS_DEFAULT_NAME_SERVER',
+DOMAINS_DEFAULT_NAME_SERVER = Setting('DOMAINS_DEFAULT_NAME_SERVER',
     'ns.{}'.format(ORCHESTRA_BASE_DOMAIN)
 )
 
 
-DOMAINS_DEFAULT_HOSTMASTER = getattr(settings, 'DOMAINS_DEFAULT_HOSTMASTER',
+DOMAINS_DEFAULT_HOSTMASTER = Setting('DOMAINS_DEFAULT_HOSTMASTER',
     'hostmaster@{}'.format(ORCHESTRA_BASE_DOMAIN)
 )
 
 
-DOMAINS_DEFAULT_TTL = getattr(settings, 'DOMAINS_DEFAULT_TTL',
+DOMAINS_DEFAULT_TTL = Setting('DOMAINS_DEFAULT_TTL',
     '1h'
 )
 
 
-DOMAINS_DEFAULT_REFRESH = getattr(settings, 'DOMAINS_DEFAULT_REFRESH',
+DOMAINS_DEFAULT_REFRESH = Setting('DOMAINS_DEFAULT_REFRESH',
     '1d'
 )
 
 
-DOMAINS_DEFAULT_RETRY = getattr(settings, 'DOMAINS_DEFAULT_RETRY',
+DOMAINS_DEFAULT_RETRY = Setting('DOMAINS_DEFAULT_RETRY',
     '2h'
 )
 
 
-DOMAINS_DEFAULT_EXPIRATION = getattr(settings, 'DOMAINS_DEFAULT_EXPIRATION',
+DOMAINS_DEFAULT_EXPIRATION = Setting('DOMAINS_DEFAULT_EXPIRATION',
     '4w'
 )
 
 
-DOMAINS_DEFAULT_MIN_CACHING_TIME = getattr(settings, 'DOMAINS_DEFAULT_MIN_CACHING_TIME',
+DOMAINS_DEFAULT_MIN_CACHING_TIME = Setting('DOMAINS_DEFAULT_MIN_CACHING_TIME',
     '1h'
 )
 
 
-DOMAINS_ZONE_PATH = getattr(settings, 'DOMAINS_ZONE_PATH',
+DOMAINS_ZONE_PATH = Setting('DOMAINS_ZONE_PATH',
     '/etc/bind/master/%(name)s'
 )
 
 
-DOMAINS_MASTERS_PATH = getattr(settings, 'DOMAINS_MASTERS_PATH',
+DOMAINS_MASTERS_PATH = Setting('DOMAINS_MASTERS_PATH',
     '/etc/bind/named.conf.local'
 )
 
 
-DOMAINS_SLAVES_PATH = getattr(settings, 'DOMAINS_SLAVES_PATH',
+DOMAINS_SLAVES_PATH = Setting('DOMAINS_SLAVES_PATH',
     '/etc/bind/named.conf.local'
 )
 
 
-DOMAINS_CHECKZONE_BIN_PATH = getattr(settings, 'DOMAINS_CHECKZONE_BIN_PATH',
+DOMAINS_CHECKZONE_BIN_PATH = Setting('DOMAINS_CHECKZONE_BIN_PATH',
     '/usr/sbin/named-checkzone -i local -k fail -n fail'
 )
 
 
-# Used for creating temporary zone files used for validation
-DOMAINS_ZONE_VALIDATION_TMP_DIR = getattr(settings, 'DOMAINS_ZONE_VALIDATION_TMP_DIR',
-    '/dev/shm'
+DOMAINS_ZONE_VALIDATION_TMP_DIR = Setting('DOMAINS_ZONE_VALIDATION_TMP_DIR', '/dev/shm',
+    help_text="Used for creating temporary zone files used for validation."
 )
 
 
-DOMAINS_DEFAULT_A = getattr(settings, 'DOMAINS_DEFAULT_A',
+DOMAINS_DEFAULT_A = Setting('DOMAINS_DEFAULT_A',
     '10.0.3.13'
 )
 
 
-DOMAINS_DEFAULT_AAAA = getattr(settings, 'DOMAINS_DEFAULT_AAAA',
+DOMAINS_DEFAULT_AAAA = Setting('DOMAINS_DEFAULT_AAAA',
     ''
 )
 
 
-DOMAINS_DEFAULT_MX = getattr(settings, 'DOMAINS_DEFAULT_MX', (
+DOMAINS_DEFAULT_MX = Setting('DOMAINS_DEFAULT_MX', (
     '10 mail.{}.'.format(ORCHESTRA_BASE_DOMAIN),
     '10 mail2.{}.'.format(ORCHESTRA_BASE_DOMAIN),
 ))
 
 
-DOMAINS_DEFAULT_NS = getattr(settings, 'DOMAINS_DEFAULT_NS', (
+DOMAINS_DEFAULT_NS = Setting('DOMAINS_DEFAULT_NS', (
     'ns1.{}.'.format(ORCHESTRA_BASE_DOMAIN),
     'ns2.{}.'.format(ORCHESTRA_BASE_DOMAIN),
 ))
 
 
-DOMAINS_FORBIDDEN = getattr(settings, 'DOMAINS_FORBIDDEN',
-    # This setting prevents users from providing random domain names, i.e. google.com
-    # You can generate a 5K forbidden domains list from Alexa's top 1M
-    # wget http://s3.amazonaws.com/alexa-static/top-1m.csv.zip -O /tmp/top-1m.csv.zip
-    # unzip -p /tmp/top-1m.csv.zip | head -n 5000 | sed "s/^.*,//" > forbidden_domains.list
-    
-    # '%(site_dir)s/forbidden_domains.list')
-    ''
+DOMAINS_FORBIDDEN = Setting('DOMAINS_FORBIDDEN', '',
+    help_text=(
+        "This setting prevents users from providing random domain names, i.e. google.com"
+        "You can generate a 5K forbidden domains list from Alexa's top 1M"
+        "wget http://s3.amazonaws.com/alexa-static/top-1m.csv.zip -O /tmp/top-1m.csv.zip"
+        "unzip -p /tmp/top-1m.csv.zip | head -n 5000 | sed 's/^.*,//' > forbidden_domains.list"
+        "'%(site_dir)s/forbidden_domains.list')"
+   )
 )
 
 
-DOMAINS_MASTERS = getattr(settings, 'DOMAINS_MASTERS',
-    # Additional master server ip addresses other than autodiscovered by router.get_servers()
-    ()
+DOMAINS_MASTERS = Setting('DOMAINS_MASTERS', (),
+    help_text="Additional master server ip addresses other than autodiscovered by router.get_servers()."
 )
 
 
-DOMAINS_SLAVES = getattr(settings, 'DOMAINS_SLAVES',
-    # Additional slave server ip addresses other than autodiscovered by router.get_servers()
-    ()
+DOMAINS_SLAVES = Setting('DOMAINS_SLAVES', (),
+    help_text="Additional slave server ip addresses other than autodiscovered by router.get_servers()."
 )
diff --git a/orchestra/contrib/issues/settings.py b/orchestra/contrib/issues/settings.py
index 6ba2387b..2c5ea335 100644
--- a/orchestra/contrib/issues/settings.py
+++ b/orchestra/contrib/issues/settings.py
@@ -1,10 +1,10 @@
-from django.conf import settings
+from orchestra.settings import Setting
 
 
-ISSUES_SUPPORT_EMAILS = getattr(settings, 'ISSUES_SUPPORT_EMAILS', [
+ISSUES_SUPPORT_EMAILS = Setting('ISSUES_SUPPORT_EMAILS', [
 ])
 
 
-ISSUES_NOTIFY_SUPERUSERS = getattr(settings, 'ISSUES_NOTIFY_SUPERUSERS',
+ISSUES_NOTIFY_SUPERUSERS = Setting('ISSUES_NOTIFY_SUPERUSERS',
     True
 )
diff --git a/orchestra/contrib/lists/settings.py b/orchestra/contrib/lists/settings.py
index 5fb943f2..4e6a015f 100644
--- a/orchestra/contrib/lists/settings.py
+++ b/orchestra/contrib/lists/settings.py
@@ -1,38 +1,36 @@
-from django.conf import settings
-
-from orchestra.settings import ORCHESTRA_BASE_DOMAIN
+from orchestra.settings import ORCHESTRA_BASE_DOMAIN, Setting
 
 
-LISTS_DOMAIN_MODEL = getattr(settings, 'LISTS_DOMAIN_MODEL',
+LISTS_DOMAIN_MODEL = Setting('LISTS_DOMAIN_MODEL',
     'domains.Domain'
 )
 
 
-LISTS_DEFAULT_DOMAIN = getattr(settings, 'LIST_DEFAULT_DOMAIN',
+LISTS_DEFAULT_DOMAIN = Setting('LISTS_DEFAULT_DOMAIN',
     'lists.{}'.format(ORCHESTRA_BASE_DOMAIN)
 )
 
 
-LISTS_LIST_URL = getattr(settings, 'LISTS_LIST_URL',
+LISTS_LIST_URL = Setting('LISTS_LIST_URL',
     'https://lists.{}/mailman/listinfo/%(name)s'.format(ORCHESTRA_BASE_DOMAIN)
 )
 
 
-LISTS_MAILMAN_POST_LOG_PATH = getattr(settings, 'LISTS_MAILMAN_POST_LOG_PATH',
+LISTS_MAILMAN_POST_LOG_PATH = Setting('LISTS_MAILMAN_POST_LOG_PATH',
     '/var/log/mailman/post'
 )
 
 
-LISTS_MAILMAN_ROOT_DIR = getattr(settings, 'LISTS_MAILMAN_ROOT_DIR',
+LISTS_MAILMAN_ROOT_DIR = Setting('LISTS_MAILMAN_ROOT_DIR',
     '/var/lib/mailman'
 )
 
 
-LISTS_VIRTUAL_ALIAS_PATH = getattr(settings, 'LISTS_VIRTUAL_ALIAS_PATH',
+LISTS_VIRTUAL_ALIAS_PATH = Setting('LISTS_VIRTUAL_ALIAS_PATH',
     '/etc/postfix/mailman_virtual_aliases'
 )
 
 
-LISTS_VIRTUAL_ALIAS_DOMAINS_PATH = getattr(settings, 'LISTS_VIRTUAL_ALIAS_DOMAINS_PATH',
+LISTS_VIRTUAL_ALIAS_DOMAINS_PATH = Setting('LISTS_VIRTUAL_ALIAS_DOMAINS_PATH',
     '/etc/postfix/mailman_virtual_domains'
 )
diff --git a/orchestra/contrib/mailboxes/backends.py b/orchestra/contrib/mailboxes/backends.py
index fe4963b8..d4ea4986 100644
--- a/orchestra/contrib/mailboxes/backends.py
+++ b/orchestra/contrib/mailboxes/backends.py
@@ -58,7 +58,7 @@ class UNIXUserMaildirBackend(ServiceController):
     
     def delete(self, mailbox):
         context = self.get_context(mailbox)
-        self.append('mv %(home)s %(home)s.deleted || exit_code=1' % context)
+        self.append('mv %(home)s %(home)s.deleted || exit_code=$?' % context)
         self.append(textwrap.dedent("""
             { sleep 2 && killall -u %(user)s -s KILL; } &
             killall -u %(user)s || true
@@ -133,7 +133,7 @@ class DovecotPostfixPasswdVirtualUserBackend(ServiceController):
             UPDATED_VIRTUAL_MAILBOX_MAPS=1""") % context
         )
         if context['deleted_home']:
-            self.append("mv %(home)s %(deleted_home)s || exit_code=1" % context)
+            self.append("mv %(home)s %(deleted_home)s || exit_code=$?" % context)
         else:
             self.append("rm -fr %(home)s" % context)
     
diff --git a/orchestra/contrib/mailboxes/settings.py b/orchestra/contrib/mailboxes/settings.py
index 8a65e6e6..7c7a8a1c 100644
--- a/orchestra/contrib/mailboxes/settings.py
+++ b/orchestra/contrib/mailboxes/settings.py
@@ -1,63 +1,62 @@
 import os
 import textwrap
 
-from django.conf import settings
 from django.utils.translation import ugettext_lazy as _
 
-from orchestra.settings import ORCHESTRA_BASE_DOMAIN
+from orchestra.settings import ORCHESTRA_BASE_DOMAIN, Setting
 
 
-MAILBOXES_DOMAIN_MODEL = getattr(settings, 'MAILBOXES_DOMAIN_MODEL',
+MAILBOXES_DOMAIN_MODEL = Setting('MAILBOXES_DOMAIN_MODEL',
     'domains.Domain'
 )
 
 
-MAILBOXES_HOME = getattr(settings, 'MAILBOXES_HOME',
+MAILBOXES_HOME = Setting('MAILBOXES_HOME',
     '/home/%(name)s/'
 )
 
 
-MAILBOXES_SIEVE_PATH = getattr(settings, 'MAILBOXES_SIEVE_PATH',
+MAILBOXES_SIEVE_PATH = Setting('MAILBOXES_SIEVE_PATH',
     os.path.join(MAILBOXES_HOME, 'Maildir/sieve/orchestra.sieve')
 )
 
 
-MAILBOXES_SIEVETEST_PATH = getattr(settings, 'MAILBOXES_SIEVETEST_PATH',
+MAILBOXES_SIEVETEST_PATH = Setting('MAILBOXES_SIEVETEST_PATH',
     '/dev/shm'
 )
 
 
-MAILBOXES_SIEVETEST_BIN_PATH = getattr(settings, 'MAILBOXES_SIEVETEST_BIN_PATH',
+MAILBOXES_SIEVETEST_BIN_PATH = Setting('MAILBOXES_SIEVETEST_BIN_PATH',
     '%(orchestra_root)s/bin/sieve-test'
 )
 
 
-MAILBOXES_VIRTUAL_MAILBOX_MAPS_PATH = getattr(settings, 'MAILBOXES_VIRTUAL_MAILBOX_MAPS_PATH',
+MAILBOXES_VIRTUAL_MAILBOX_MAPS_PATH = Setting('MAILBOXES_VIRTUAL_MAILBOX_MAPS_PATH',
     '/etc/postfix/virtual_mailboxes'
 )
 
 
-MAILBOXES_VIRTUAL_ALIAS_MAPS_PATH = getattr(settings, 'MAILBOXES_VIRTUAL_ALIAS_MAPS_PATH',
+MAILBOXES_VIRTUAL_ALIAS_MAPS_PATH = Setting('MAILBOXES_VIRTUAL_ALIAS_MAPS_PATH',
     '/etc/postfix/virtual_aliases'
 )
 
 
-MAILBOXES_VIRTUAL_ALIAS_DOMAINS_PATH = getattr(settings, 'MAILBOXES_VIRTUAL_ALIAS_DOMAINS_PATH',
+MAILBOXES_VIRTUAL_ALIAS_DOMAINS_PATH = Setting('MAILBOXES_VIRTUAL_ALIAS_DOMAINS_PATH',
     '/etc/postfix/virtual_domains'
 )
 
 
-MAILBOXES_LOCAL_DOMAIN = getattr(settings, 'MAILBOXES_LOCAL_DOMAIN', 
+MAILBOXES_LOCAL_DOMAIN = Setting('MAILBOXES_LOCAL_DOMAIN', 
     ORCHESTRA_BASE_DOMAIN
 )
 
 
-MAILBOXES_PASSWD_PATH = getattr(settings, 'MAILBOXES_PASSWD_PATH',
+MAILBOXES_PASSWD_PATH = Setting('MAILBOXES_PASSWD_PATH',
     '/etc/dovecot/passwd'
 )
 
 
-MAILBOXES_MAILBOX_FILTERINGS = getattr(settings, 'MAILBOXES_MAILBOX_FILTERINGS', {
+MAILBOXES_MAILBOX_FILTERINGS = Setting('MAILBOXES_MAILBOX_FILTERINGS', {
     # value: (verbose_name, filter)
     'DISABLE': (_("Disable"), ''),
     'REJECT': (_("Reject spam"), textwrap.dedent("""
@@ -76,26 +75,26 @@ MAILBOXES_MAILBOX_FILTERINGS = getattr(settings, 'MAILBOXES_MAILBOX_FILTERINGS',
 })
 
 
-MAILBOXES_MAILBOX_DEFAULT_FILTERING = getattr(settings, 'MAILBOXES_MAILBOX_DEFAULT_FILTERING',
-    'REDIRECT'
+MAILBOXES_MAILBOX_DEFAULT_FILTERING = Setting('MAILBOXES_MAILBOX_DEFAULT_FILTERING', 'REDIRECT',
+    choices=tuple((k, v[0]) for k,v in MAILBOXES_MAILBOX_FILTERINGS.items())
 )
 
 
-MAILBOXES_MAILDIRSIZE_PATH = getattr(settings, 'MAILBOXES_MAILDIRSIZE_PATH',
+MAILBOXES_MAILDIRSIZE_PATH = Setting('MAILBOXES_MAILDIRSIZE_PATH',
     '%(home)s/Maildir/maildirsize'
 )
 
 
-MAILBOXES_LOCAL_ADDRESS_DOMAIN = getattr(settings, 'MAILBOXES_LOCAL_ADDRESS_DOMAIN',
+MAILBOXES_LOCAL_ADDRESS_DOMAIN = Setting('MAILBOXES_LOCAL_ADDRESS_DOMAIN',
     ORCHESTRA_BASE_DOMAIN
 )
 
 
-MAILBOXES_MAIL_LOG_PATH = getattr(settings, 'MAILBOXES_MAIL_LOG_PATH',
+MAILBOXES_MAIL_LOG_PATH = Setting('MAILBOXES_MAIL_LOG_PATH',
     '/var/log/mail.log'
 )
 
 
-MAILBOXES_MOVE_ON_DELETE_PATH = getattr(settings, 'MAILBOXES_MOVE_ON_DELETE_PATH',
+MAILBOXES_MOVE_ON_DELETE_PATH = Setting('MAILBOXES_MOVE_ON_DELETE_PATH',
     ''
 )
diff --git a/orchestra/contrib/miscellaneous/settings.py b/orchestra/contrib/miscellaneous/settings.py
index fe6628a6..7e34c968 100644
--- a/orchestra/contrib/miscellaneous/settings.py
+++ b/orchestra/contrib/miscellaneous/settings.py
@@ -1,6 +1,6 @@
-from django.conf import settings
+from orchestra.settings import Setting
 
 
-MISCELLANEOUS_IDENTIFIER_VALIDATORS = getattr(settings, 'MISCELLANEOUS_IDENTIFIER_VALIDATORS', {
+MISCELLANEOUS_IDENTIFIER_VALIDATORS = Setting('MISCELLANEOUS_IDENTIFIER_VALIDATORS', {
     # <miscservice__name>: <validator_function>
 })
diff --git a/orchestra/contrib/orchestration/settings.py b/orchestra/contrib/orchestration/settings.py
index 0c248fa4..9e963889 100644
--- a/orchestra/contrib/orchestration/settings.py
+++ b/orchestra/contrib/orchestration/settings.py
@@ -1,36 +1,37 @@
 from datetime import timedelta
 from os import path
 
-from django.conf import settings
+from orchestra.settings import Setting
 
 
-ORCHESTRATION_OS_CHOICES = getattr(settings, 'ORCHESTRATION_OS_CHOICES', (
+ORCHESTRATION_OS_CHOICES = Setting('ORCHESTRATION_OS_CHOICES', (
     ('LINUX', "Linux"),
 ))
 
 
-ORCHESTRATION_DEFAULT_OS = getattr(settings, 'ORCHESTRATION_DEFAULT_OS', 'LINUX')
+ORCHESTRATION_DEFAULT_OS = Setting('ORCHESTRATION_DEFAULT_OS', 'LINUX',
+    choices=ORCHESTRATION_OS_CHOICES)
 
 
-ORCHESTRATION_SSH_KEY_PATH = getattr(settings, 'ORCHESTRATION_SSH_KEY_PATH', 
+ORCHESTRATION_SSH_KEY_PATH = Setting('ORCHESTRATION_SSH_KEY_PATH', 
     path.join(path.expanduser('~'), '.ssh/id_rsa'))
 
 
-ORCHESTRATION_ROUTER = getattr(settings, 'ORCHESTRATION_ROUTER',
+ORCHESTRATION_ROUTER = Setting('ORCHESTRATION_ROUTER',
     'orchestra.contrib.orchestration.models.Route'
 )
 
 
-ORCHESTRATION_TEMP_SCRIPT_PATH = getattr(settings, 'ORCHESTRATION_TEMP_SCRIPT_PATH',
+ORCHESTRATION_TEMP_SCRIPT_PATH = Setting('ORCHESTRATION_TEMP_SCRIPT_PATH',
     '/dev/shm'
 )
 
 
-ORCHESTRATION_DISABLE_EXECUTION = getattr(settings, 'ORCHESTRATION_DISABLE_EXECUTION',
+ORCHESTRATION_DISABLE_EXECUTION = Setting('ORCHESTRATION_DISABLE_EXECUTION',
     False
 )
 
 
-ORCHESTRATION_BACKEND_CLEANUP_DELTA = getattr(settings, 'ORCHESTRATION_BACKEND_CLEANUP_DELTA',
+ORCHESTRATION_BACKEND_CLEANUP_DELTA = Setting('ORCHESTRATION_BACKEND_CLEANUP_DELTA',
     timedelta(days=15)
 )
diff --git a/orchestra/contrib/orders/settings.py b/orchestra/contrib/orders/settings.py
index e25d7599..ea7f56fe 100644
--- a/orchestra/contrib/orders/settings.py
+++ b/orchestra/contrib/orders/settings.py
@@ -1,20 +1,20 @@
-from django.conf import settings
+from orchestra.settings import Setting
 
 
 # Pluggable backend for bill generation.
-ORDERS_BILLING_BACKEND = getattr(settings, 'ORDERS_BILLING_BACKEND',
+ORDERS_BILLING_BACKEND = Setting('ORDERS_BILLING_BACKEND',
     'orchestra.contrib.orders.billing.BillsBackend'
 )
 
 
 # Pluggable service class
-ORDERS_SERVICE_MODEL = getattr(settings, 'ORDERS_SERVICE_MODEL',
+ORDERS_SERVICE_MODEL = Setting('ORDERS_SERVICE_MODEL',
     'services.Service'
 )
 
 
 # Prevent inspecting these apps for service accounting
-ORDERS_EXCLUDED_APPS = getattr(settings, 'ORDERS_EXCLUDED_APPS', (
+ORDERS_EXCLUDED_APPS = Setting('ORDERS_EXCLUDED_APPS', (
     'orders',
     'admin',
     'contenttypes',
@@ -29,6 +29,6 @@ ORDERS_EXCLUDED_APPS = getattr(settings, 'ORDERS_EXCLUDED_APPS', (
 
 # Only account for significative changes
 # metric_storage new value: lastvalue*(1+threshold) > currentvalue or lastvalue*threshold < currentvalue
-ORDERS_METRIC_ERROR = getattr(settings, 'ORDERS_METRIC_ERROR',
+ORDERS_METRIC_ERROR = Setting('ORDERS_METRIC_ERROR',
     0.01
 )
diff --git a/orchestra/contrib/payments/settings.py b/orchestra/contrib/payments/settings.py
index 06fdcaf7..6d71a964 100644
--- a/orchestra/contrib/payments/settings.py
+++ b/orchestra/contrib/payments/settings.py
@@ -1,28 +1,34 @@
-from django.conf import settings
+from orchestra.settings import Setting
+
+from .. import payments
 
 
-PAYMENT_CURRENCY = getattr(settings, 'PAYMENT_CURRENCY',
+PAYMENT_CURRENCY = Setting('PAYMENT_CURRENCY',
     'Eur'
 )
 
 
-PAYMENTS_DD_CREDITOR_NAME = getattr(settings, 'PAYMENTS_DD_CREDITOR_NAME',
+PAYMENTS_DD_CREDITOR_NAME = Setting('PAYMENTS_DD_CREDITOR_NAME',
     'Orchestra')
 
 
-PAYMENTS_DD_CREDITOR_IBAN = getattr(settings, 'PAYMENTS_DD_CREDITOR_IBAN',
+PAYMENTS_DD_CREDITOR_IBAN = Setting('PAYMENTS_DD_CREDITOR_IBAN',
     'IE98BOFI90393912121212')
 
 
-PAYMENTS_DD_CREDITOR_BIC = getattr(settings, 'PAYMENTS_DD_CREDITOR_BIC',
+PAYMENTS_DD_CREDITOR_BIC = Setting('PAYMENTS_DD_CREDITOR_BIC',
     'BOFIIE2D')
 
 
-PAYMENTS_DD_CREDITOR_AT02_ID = getattr(settings, 'PAYMENTS_DD_CREDITOR_AT02_ID',
+PAYMENTS_DD_CREDITOR_AT02_ID = Setting('PAYMENTS_DD_CREDITOR_AT02_ID',
     'InvalidAT02ID')
 
 
-PAYMENTS_ENABLED_METHODS = getattr(settings, 'PAYMENTS_ENABLED_METHODS', [
-    'orchestra.contrib.payments.methods.sepadirectdebit.SEPADirectDebit',
-    'orchestra.contrib.payments.methods.creditcard.CreditCard',
-])
+PAYMENTS_ENABLED_METHODS = Setting('PAYMENTS_ENABLED_METHODS', (
+        'orchestra.contrib.payments.methods.sepadirectdebit.SEPADirectDebit',
+        'orchestra.contrib.payments.methods.creditcard.CreditCard',
+    ),
+    # lazy loading
+    choices=lambda : ((m.get_class_path(), m.get_class_path()) for m in payments.methods.PaymentMethod.get_plugins()),
+    multiple=True,
+)
diff --git a/orchestra/contrib/resources/forms.py b/orchestra/contrib/resources/forms.py
index 37e2e5fa..e6aca62c 100644
--- a/orchestra/contrib/resources/forms.py
+++ b/orchestra/contrib/resources/forms.py
@@ -6,7 +6,7 @@ from orchestra.forms.widgets import ShowTextWidget, ReadOnlyWidget
 
 class ResourceForm(forms.ModelForm):
     verbose_name = forms.CharField(label=_("Name"), required=False,
-        widget=ShowTextWidget(bold=True))
+        widget=ShowTextWidget(tag='<b>'))
     allocated = forms.DecimalField(label=_("Allocated"))
     unit = forms.CharField(label=_("Unit"), widget=ShowTextWidget(), required=False)
     
diff --git a/orchestra/contrib/resources/models.py b/orchestra/contrib/resources/models.py
index a11d742c..7e093d5a 100644
--- a/orchestra/contrib/resources/models.py
+++ b/orchestra/contrib/resources/models.py
@@ -124,7 +124,7 @@ class Resource(models.Model):
         self.sync_periodic_task()
         # This only work on tests (multiprocessing used on real deployments)
         apps.get_app_config('resources').reload_relations()
-        run('sleep 2 && touch %s/wsgi.py' % get_project_dir(), async=True)
+        run('{ sleep 2 && touch %s/wsgi.py; } &' % get_project_dir(), async=True)
     
     def delete(self, *args, **kwargs):
         super(Resource, self).delete(*args, **kwargs)
diff --git a/orchestra/contrib/saas/settings.py b/orchestra/contrib/saas/settings.py
index 132001a2..79221eee 100644
--- a/orchestra/contrib/saas/settings.py
+++ b/orchestra/contrib/saas/settings.py
@@ -1,85 +1,89 @@
-from django.conf import settings
+from orchestra.settings import ORCHESTRA_BASE_DOMAIN, Setting
 
-from orchestra.settings import ORCHESTRA_BASE_DOMAIN
+from .. import saas
 
 
-SAAS_ENABLED_SERVICES = getattr(settings, 'SAAS_ENABLED_SERVICES', (
-    'orchestra.contrib.saas.services.moodle.MoodleService',
-    'orchestra.contrib.saas.services.bscw.BSCWService',
-    'orchestra.contrib.saas.services.gitlab.GitLabService',
-    'orchestra.contrib.saas.services.phplist.PHPListService',
-    'orchestra.contrib.saas.services.wordpress.WordPressService',
-    'orchestra.contrib.saas.services.dokuwiki.DokuWikiService',
-    'orchestra.contrib.saas.services.drupal.DrupalService',
-    'orchestra.contrib.saas.services.seafile.SeaFileService',
-))
+SAAS_ENABLED_SERVICES = Setting('SAAS_ENABLED_SERVICES', (
+        'orchestra.contrib.saas.services.moodle.MoodleService',
+        'orchestra.contrib.saas.services.bscw.BSCWService',
+        'orchestra.contrib.saas.services.gitlab.GitLabService',
+        'orchestra.contrib.saas.services.phplist.PHPListService',
+        'orchestra.contrib.saas.services.wordpress.WordPressService',
+        'orchestra.contrib.saas.services.dokuwiki.DokuWikiService',
+        'orchestra.contrib.saas.services.drupal.DrupalService',
+        'orchestra.contrib.saas.services.seafile.SeaFileService',
+    ),
+    # lazy loading
+    choices=lambda : ((s.get_class_path(), s.get_class_path()) for s in saas.services.SoftwareService.get_plugins()),
+    multiple=True,
+)
 
 
-SAAS_WORDPRESS_ADMIN_PASSWORD = getattr(settings, 'SAAS_WORDPRESSMU_ADMIN_PASSWORD',
+SAAS_WORDPRESS_ADMIN_PASSWORD = Setting('SAAS_WORDPRESSMU_ADMIN_PASSWORD',
     'secret'
 )
 
 
-SAAS_WORDPRESS_BASE_URL = getattr(settings, 'SAAS_WORDPRESS_BASE_URL',
+SAAS_WORDPRESS_BASE_URL = Setting('SAAS_WORDPRESS_BASE_URL',
     'http://blogs.{}/'.format(ORCHESTRA_BASE_DOMAIN)
 )
 
 
-SAAS_DOKUWIKI_TEMPLATE_PATH = getattr(settings, 'SAAS_DOKUWIKI_TEMPLATE_PATH',
+SAAS_DOKUWIKI_TEMPLATE_PATH = Setting('SAAS_DOKUWIKI_TEMPLATE_PATH',
     '/home/httpd/htdocs/wikifarm/template.tar.gz'
 )
 
 
-SAAS_DOKUWIKI_FARM_PATH = getattr(settings, 'WEBSITES_DOKUWIKI_FARM_PATH',
+SAAS_DOKUWIKI_FARM_PATH = Setting('WEBSITES_DOKUWIKI_FARM_PATH',
     '/home/httpd/htdocs/wikifarm/farm'
 )
 
 
-SAAS_DRUPAL_SITES_PATH = getattr(settings, 'WEBSITES_DRUPAL_SITES_PATH',
+SAAS_DRUPAL_SITES_PATH = Setting('WEBSITES_DRUPAL_SITES_PATH',
     '/home/httpd/htdocs/drupal-mu/sites/%(site_name)s'
 )
 
 
-SAAS_PHPLIST_DB_NAME = getattr(settings, 'SAAS_PHPLIST_DB_NAME',
+SAAS_PHPLIST_DB_NAME = Setting('SAAS_PHPLIST_DB_NAME',
     'phplist_mu'
 )
 
 
-SAAS_PHPLIST_BASE_DOMAIN = getattr(settings, 'SAAS_PHPLIST_BASE_DOMAIN',
+SAAS_PHPLIST_BASE_DOMAIN = Setting('SAAS_PHPLIST_BASE_DOMAIN',
     'lists.{}'.format(ORCHESTRA_BASE_DOMAIN)
 )
 
 
-SAAS_SEAFILE_DOMAIN = getattr(settings, 'SAAS_SEAFILE_DOMAIN',
+SAAS_SEAFILE_DOMAIN = Setting('SAAS_SEAFILE_DOMAIN',
     'seafile.{}'.format(ORCHESTRA_BASE_DOMAIN)
 )
 
 
-SAAS_SEAFILE_DEFAULT_QUOTA = getattr(settings, 'SAAS_SEAFILE_DEFAULT_QUOTA',
+SAAS_SEAFILE_DEFAULT_QUOTA = Setting('SAAS_SEAFILE_DEFAULT_QUOTA',
     50
 )
 
 
-SAAS_BSCW_DOMAIN = getattr(settings, 'SAAS_BSCW_DOMAIN',
+SAAS_BSCW_DOMAIN = Setting('SAAS_BSCW_DOMAIN',
     'bscw.{}'.format(ORCHESTRA_BASE_DOMAIN)
 )
 
 
-SAAS_BSCW_DEFAULT_QUOTA = getattr(settings, 'SAAS_BSCW_DEFAULT_QUOTA',
+SAAS_BSCW_DEFAULT_QUOTA = Setting('SAAS_BSCW_DEFAULT_QUOTA',
     50
 )
 
-SAAS_BSCW_BSADMIN_PATH = getattr(settings, 'SAAS_BSCW_BSADMIN_PATH', 
+SAAS_BSCW_BSADMIN_PATH = Setting('SAAS_BSCW_BSADMIN_PATH', 
     '/home/httpd/bscw/bin/bsadmin',
 )
 
 
-SAAS_GITLAB_ROOT_PASSWORD = getattr(settings, 'SAAS_GITLAB_ROOT_PASSWORD',
+SAAS_GITLAB_ROOT_PASSWORD = Setting('SAAS_GITLAB_ROOT_PASSWORD',
     'secret'
 )
 
 
-SAAS_GITLAB_DOMAIN = getattr(settings, 'SAAS_GITLAB_DOMAIN',
+SAAS_GITLAB_DOMAIN = Setting('SAAS_GITLAB_DOMAIN',
     'gitlab.{}'.format(ORCHESTRA_BASE_DOMAIN)
 )
 
diff --git a/orchestra/contrib/services/settings.py b/orchestra/contrib/services/settings.py
index 15867ce9..b81ef2a9 100644
--- a/orchestra/contrib/services/settings.py
+++ b/orchestra/contrib/services/settings.py
@@ -1,39 +1,40 @@
-from django.conf import settings
 from django.utils.translation import ugettext_lazy as _
 
+from orchestra.settings import Setting
 
-SERVICES_SERVICE_TAXES = getattr(settings, 'SERVICES_SERVICE_TAXES', (
+
+SERVICES_SERVICE_TAXES = Setting('SERVICES_SERVICE_TAXES', (
     (0, _("Duty free")),
     (21, "21%"),
 ))
 
 
-SERVICES_SERVICE_DEFAULT_TAX = getattr(settings, 'SERVICES_SERVICE_DEFAULT_TAX',
-    0
+SERVICES_SERVICE_DEFAULT_TAX = Setting('SERVICES_SERVICE_DEFAULT_TAX', 0,
+    choices=SERVICES_SERVICE_TAXES
 )
 
 
-SERVICES_SERVICE_ANUAL_BILLING_MONTH = getattr(settings, 'SERVICES_SERVICE_ANUAL_BILLING_MONTH',
-    1
+SERVICES_SERVICE_ANUAL_BILLING_MONTH = Setting('SERVICES_SERVICE_ANUAL_BILLING_MONTH', 1,
+    choices=tuple((n, n) for n in range(1, 13))
 )
 
 
-SERVICES_ORDER_MODEL = getattr(settings, 'SERVICES_ORDER_MODEL',
+SERVICES_ORDER_MODEL = Setting('SERVICES_ORDER_MODEL',
     'orders.Order'
 )
 
 
-SERVICES_RATE_CLASS = getattr(settings, 'SERVICES_RATE_CLASS',
+SERVICES_RATE_CLASS = Setting('SERVICES_RATE_CLASS',
     'orchestra.contrib.plans.models.Rate'
 )
 
 
-SERVICES_DEFAULT_IGNORE_PERIOD = getattr(settings, 'SERVICES_DEFAULT_IGNORE_PERIOD',
+SERVICES_DEFAULT_IGNORE_PERIOD = Setting('SERVICES_DEFAULT_IGNORE_PERIOD',
     'TEN_DAYS'
 )
 
 
-SERVICES_IGNORE_ACCOUNT_TYPE = getattr(settings, 'SERVICES_IGNORE_ACCOUNT_TYPE', (
+SERVICES_IGNORE_ACCOUNT_TYPE = Setting('SERVICES_IGNORE_ACCOUNT_TYPE', (
     'superuser',
     'STAFF',
     'FRIEND',
diff --git a/orchestra/contrib/settings/__init__.py b/orchestra/contrib/settings/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/orchestra/contrib/settings/admin.py b/orchestra/contrib/settings/admin.py
new file mode 100644
index 00000000..52785c0d
--- /dev/null
+++ b/orchestra/contrib/settings/admin.py
@@ -0,0 +1,89 @@
+from functools import partial
+
+from django.contrib import admin, messages
+from django.db import models
+
+from django.views.generic.edit import FormView
+from django.utils.translation import ngettext, ugettext_lazy as _
+
+from orchestra.settings import Setting
+from orchestra.utils import sys, paths
+
+from . import parser
+from .forms import SettingFormSet
+
+
+class SettingView(FormView):
+    template_name = 'admin/settings/change_form.html'
+    form_class = SettingFormSet
+    success_url = '.'
+    
+    def get_context_data(self, **kwargs):
+        context = super(SettingView, self).get_context_data(**kwargs)
+        context.update({
+            'title': _("Change settings"),
+            'settings_file': parser.get_settings_file(),
+        })
+        return context
+    
+    def get_initial(self):
+        initial_data = []
+        prev_app = None
+        account = 0
+        for name, setting in Setting.settings.items():
+            app = name.split('_')[0]
+            initial = {
+                'name': setting.name,
+                'help_text': setting.help_text,
+                'default': setting.default,
+                'type': type(setting.default),
+                'value': setting.value,
+                'choices': setting.choices,
+                'app': app,
+                'editable': setting.editable,
+                'multiple': setting.multiple,
+            }
+            if app == 'ORCHESTRA':
+                initial_data.insert(account, initial)
+                account += 1
+            else:
+                initial_data.append(initial)
+        return initial_data
+    
+    def form_valid(self, form):
+        settings = Setting.settings
+        changes = {}
+        for data in form.cleaned_data:
+            setting = settings[data['name']]
+            if not isinstance(data['value'], parser.NotSupported) and setting.editable:
+                if setting.value != data['value']:
+                    if setting.default == data['value']:
+                        changes[setting.name] = parser.Remove()
+                    else:
+                        changes[setting.name] = parser.serialize(data['value'])
+        if changes:
+            # Display confirmation
+            if not self.request.POST.get('confirmation'):
+                settings_file = parser.get_settings_file()
+                new_content = parser.apply(changes)
+                diff = sys.run("cat <<EOF | diff %s -\n%s\nEOF" % (settings_file, new_content), error_codes=[1, 0]).stdout
+                context = self.get_context_data(form=form)
+                context['diff'] = diff
+                return self.render_to_response(context)
+            
+            # Save changes
+            parser.save(changes)
+            n = len(changes)
+            messages.success(self.request, ngettext(
+                _("One change successfully applied, the orchestra is going to be restarted..."),
+                _("%s changes successfully applied, the orchestra is going to be restarted...") % n,
+                n)
+            )
+            # TODO find aonther way without root and implement reload
+#            sys.run('echo { sleep 2 && python3 %s/manage.py reload; } &' % paths.get_site_dir(), async=True)
+        else:
+            messages.success(self.request, _("No changes have been detected."))
+        return super(SettingView, self).form_valid(form)
+
+
+admin.site.register_url(r'^settings/setting/$', SettingView.as_view(), 'settings_edit_settings')
diff --git a/orchestra/contrib/settings/forms.py b/orchestra/contrib/settings/forms.py
new file mode 100644
index 00000000..c5110f1d
--- /dev/null
+++ b/orchestra/contrib/settings/forms.py
@@ -0,0 +1,112 @@
+import math
+from copy import deepcopy
+from functools import partial
+
+from django import forms
+from django.core.exceptions import ValidationError
+from django.forms.formsets import formset_factory
+from django.utils.translation import ugettext_lazy as _
+
+from orchestra.forms import ReadOnlyFormMixin, widgets
+
+from . import parser
+
+from django import forms
+from django.utils.safestring import mark_safe
+
+
+class SettingForm(ReadOnlyFormMixin, forms.Form):
+    TEXTAREA = partial(forms.CharField,
+        widget=forms.Textarea(attrs={
+            'cols': 65,
+            'rows': 2,
+            'style': 'font-family:monospace'
+        }))
+    CHARFIELD = partial(forms.CharField,
+                widget=forms.TextInput(attrs={
+                    'size': 65,
+                    'style': 'font-family:monospace'
+                }))
+    NON_EDITABLE = partial(forms.CharField, widget=widgets.ShowTextWidget(), required=False)
+    FORMFIELD_FOR_SETTING_TYPE = {
+            bool: partial(forms.BooleanField, required=False),
+            int: forms.IntegerField,
+            tuple: TEXTAREA,
+            list: TEXTAREA,
+            dict: TEXTAREA,
+            type(_()): CHARFIELD,
+            str: CHARFIELD,
+        }
+    
+    name = forms.CharField(label=_("name"))
+    default = forms.CharField(label=_("default"))
+    
+    class Meta:
+        readonly_fields = ('name', 'default')
+    
+    def __init__(self, *args, **kwargs):
+        initial = kwargs.get('initial')
+        if initial:
+            self.setting_type = initial['type']
+            serialized_value = parser.serialize(initial['value'])
+            serialized_default = parser.serialize(initial['default'])
+            if not initial['editable'] or isinstance(serialized_value, parser.NotSupported):
+                field = self.NON_EDITABLE
+            else:
+                choices = initial.get('choices')
+                field = forms.ChoiceField
+                multiple = initial['multiple']
+                if multiple:
+                    field = partial(forms.MultipleChoiceField, widget=forms.CheckboxSelectMultiple)
+                if choices:
+                    # Lazy loading
+                    if callable(choices):
+                        choices = choices()
+                    if not multiple:
+                        choices = tuple((parser.serialize(val), verb) for val, verb in choices)
+                    field = partial(field, choices=choices)
+                else:
+                    field = self.FORMFIELD_FOR_SETTING_TYPE.get(self.setting_type, self.NON_EDITABLE)
+                    field = deepcopy(field)
+            value = initial['value']
+            default = initial['default']
+            real_field = field
+            while isinstance(real_field, partial):
+                real_field = real_field.func
+            # Do not serialize following form types
+            if real_field not in (forms.MultipleChoiceField, forms.BooleanField):
+                value = serialized_value
+            if real_field is not forms.BooleanField:
+                default = serialized_default
+            initial['value'] = value
+            initial['default'] = default
+        super(SettingForm, self).__init__(*args, **kwargs)
+        if initial:
+            self.changed = bool(value != default)
+            self.fields['value'] = field(label=_("value"))
+            if isinstance(self.fields['value'].widget, forms.Textarea):
+                rows = math.ceil(len(value)/65)
+                self.fields['value'].widget.attrs['rows'] = rows
+            self.fields['name'].help_text = initial['help_text']
+            self.fields['name'].widget.attrs['readonly'] = True
+            self.app = initial['app']
+        
+    def clean_value(self):
+        value = self.cleaned_data['value']
+        if not value:
+            return parser.NotSupported()
+        if not isinstance(value, str):
+            value = parser.serialize(value)
+        try:
+            value = eval(value, parser.get_eval_context())
+        except Exception as exc:
+            raise ValidationError(str(exc))
+        if not isinstance(value, self.setting_type):
+            if self.setting_type in (tuple, list) and isinstance(value, (tuple, list)):
+                value = self.setting_type(value)
+            else:
+                raise ValidationError("Please provide a %s." % self.setting_type.__name__)
+        return value
+
+
+SettingFormSet = formset_factory(SettingForm, extra=0)
diff --git a/orchestra/contrib/settings/parser.py b/orchestra/contrib/settings/parser.py
new file mode 100644
index 00000000..be8db75f
--- /dev/null
+++ b/orchestra/contrib/settings/parser.py
@@ -0,0 +1,148 @@
+import ast
+import os
+import re
+
+from django.utils.translation import ugettext_lazy as _
+
+from orchestra.utils.paths import get_project_dir
+
+
+class Remove(object):
+    """ used to signal a setting remove """
+    pass
+
+
+def get_settings_file():
+    return os.path.join(get_project_dir(), 'settings.py')
+
+
+def _find_updates(changes, settings_file):
+    """ find all updates needed for applying changes on settings_file content """
+    with open(settings_file, 'rb') as handler:
+        p = ast.parse(handler.read())
+    updates = []
+    for elem in p.body:
+        if updates and updates[-1][-1] is None:
+            updates[-1][-1] = elem.lineno-1
+        targets = getattr(elem, 'targets', None)
+        if targets:
+            var_name = targets[0].id
+            if var_name in changes:
+                updates.append([var_name, elem.lineno, None])
+    return updates
+
+
+class LazyUgettextRepr(object):
+    def __init__(self, value):
+        self.value = value
+    
+    def __repr__(self):
+        return '_("%s")' % self.value
+    
+    def __len__(self):
+        return len(repr(self.value))
+
+
+class NotSupported(object):
+    def __repr__(self):
+        return 'Serialization not supported'
+    
+    def __len__(self):
+        return 0
+
+
+def get_eval_context():
+    return {
+        'NotSupported': NotSupported,
+        '_': _,
+    }
+
+def serialize(obj, init=True):
+    if isinstance(obj, NotSupported):
+        return obj
+    elif isinstance(obj, type(_())):
+        _obj = LazyUgettextRepr(obj)
+    elif isinstance(obj, dict):
+        _obj = {}
+        for name, value in obj.items():
+            name = serialize(name, init=False)
+            value = serialize(value, init=False)
+            if isinstance(name, NotSupported) or isinstance(value, NotSupported):
+                return NotSupported()
+            _obj[name] = value
+    elif isinstance(obj, (tuple, list)):
+        _obj = []
+        for nested in obj:
+            nested = serialize(nested, init=False)
+            if isinstance(nested, NotSupported):
+                return nested
+            _obj.append(nested)
+        _obj = type(obj)(_obj)
+    elif isinstance(obj, (str, bool, int)):
+        _obj = obj
+    else:
+        _obj = NotSupported()
+    return repr(_obj) if init else _obj
+
+
+def _format_setting(name, value):
+    if isinstance(value, Remove):
+        return ""
+    value = serialize(eval(value), get_eval_context())
+    return "{name} = {value}".format(name=name, value=value)
+
+
+def apply(changes, settings_file=get_settings_file()):
+    """ returns settings_file content with applied changes """
+    updates = _find_updates(changes, settings_file)
+    content = []
+    inside = False
+    lineno = None
+    if updates:
+        name, lineno, end = updates.pop(0)
+    # update existing variable declarations
+    with open(settings_file, 'r') as handler:
+        for num, line in enumerate(handler.readlines(), 1):
+            line = line.rstrip()
+            if num == lineno:
+                value = changes.pop(name)
+                line = _format_setting(name, value)
+                if line:
+                    content.append(line)
+                inside = True
+                comments = []
+                lastend = end
+                try:
+                    name, lineno, end = updates.pop(0)
+                except IndexError:
+                    if lastend is None:
+                        break
+            if not inside:
+                content.append(line)
+            else:
+                # Discard lines since variable will be replaced
+                # But save comments and blank lines
+                if re.match(r'^\s*(#.*)*\s*$', line):
+                    comments.append(line)
+                else:
+                    comments = []
+                # End of variable declaration
+                if num == lastend:
+                    content.extend(comments)
+                    inside = False
+
+    # insert new variables
+    for name, value in changes.items():
+        content.append(_format_setting(name, value))
+    return '\n'.join(content)
+
+
+def save(changes, settings_file=get_settings_file(), backup=True):
+    """ apply changes to project.settings file, saving a backup """
+    new_settings = apply(changes, settings_file)
+    tmp_settings_file = settings_file + '.tmp'
+    with open(tmp_settings_file, 'w') as handle:
+        handle.write(new_settings)
+    if backup:
+        os.rename(settings_file, settings_file + '.backup')
+    os.rename(tmp_settings_file, settings_file)
diff --git a/orchestra/contrib/settings/templates/admin/settings/change_form.html b/orchestra/contrib/settings/templates/admin/settings/change_form.html
new file mode 100644
index 00000000..ed935ad6
--- /dev/null
+++ b/orchestra/contrib/settings/templates/admin/settings/change_form.html
@@ -0,0 +1,86 @@
+{% extends "admin/base_site.html" %}
+{% load i18n l10n %}
+{% load url from future %}
+{% load admin_urls static utils %}
+
+{% block extrastyle %}
+{{ block.super }}
+<link rel="stylesheet" type="text/css" href="{% static "admin/css/forms.css" %}" />
+<link rel="stylesheet" type="text/css" href="{% static "orchestra/css/hide-inline-id.css" %}" />
+{% endblock %}
+
+
+{% block breadcrumbs %}
+<div class="breadcrumbs">
+<a href="{% url 'admin:index' %}">{% trans 'Home' %}</a>
+{% if diff %} &rsaquo; <a href=".">Settings</a> &rsaquo; Confirm changes{% else %} &rsaquo; Settings{% endif %}
+</div>
+{% endblock %}
+
+
+{% block content %}
+    <div>
+        <form method="post" action="">{% csrf_token %}
+    {% if diff %}
+        {% blocktrans %}
+        <p>The following changes will be performed to <tt>{{ settings_file }}</tt> file.</p>
+        {% endblocktrans %}
+        <PRE>{{ diff }}</PRE>
+        {{ form.management_form }}
+        <table style="display:none">
+            {% for form in form %}
+            {{ form }}
+            {% endfor %}
+        </table>
+        <input type="hidden" name="confirmation" value="True" />
+        <div class="submit-row"><input type="submit" value="Confirm changes" class="default" name="_diff"></div>
+    {% else %}
+        {% blocktrans %}
+        <p><tt>{{ settings_file }}</tt> file will be automatically updated and Orchestra restarted according to your changes.
+        {% endblocktrans %}
+        {% if form.errors %}
+        <p class="errornote">
+        {% trans "Please correct the errors below." %}
+        </p>
+        {{ form.non_form_errors.as_ul }}
+        {% endif %}
+        {{ form.management_form }}
+        {% regroup form.forms by app as formlist %}
+        {% for app in formlist %}
+            <fieldset class="module">
+            <h2>{{ app.grouper|lower|capfirst }}</h2>
+            <table id="formset" class="form" style="width:100%">
+            {% for form in app.list %}
+                  {{ form.non_field_errors }}
+                  {% if forloop.first %}
+                  <thead><tr>
+                    {% for field in form.visible_fields %}
+                    <th style="width:{% if forloop.first %}30{% else %}35{% endif %}%">{{ field.label|capfirst }}</th>
+                    {% endfor %}
+                  </tr></thead>
+                  {% endif %}
+                  <tr class="{% cycle row1,row2 %}">
+                  {% for field in form.visible_fields %}
+                    <td>
+                    {# Include the hidden fields in the form #}
+                    {% if forloop.first %}
+                      {% for hidden in form.hidden_fields %}
+                      {{ hidden }}
+                      {% endfor %}
+                    {% endif %}
+                      {{ field.errors.as_ul }}
+                      <div style="font-family:monospace">{{ field }}{% if forloop.last %}{% if form.changed %}<div style="float:right" title="Changed">&#8224;</div>{% endif %}{% endif %}</div>
+                      <p class="help" style="max-width:100px; white-space:nowrap;">{{ field.help_text }}</p>
+                    </td>
+                  {% endfor %}
+                  </tr>
+                {% endfor %}
+                </table>
+                </fieldset>
+            {% endfor %}
+        <div class="submit-row"><input type="submit" value="Diff changes" class="default" name="_diff"></div>
+    {% endif %}
+        </form>
+{% endblock %}
+
+
diff --git a/orchestra/contrib/systemusers/backends.py b/orchestra/contrib/systemusers/backends.py
index 6214c6fc..83caaa1c 100644
--- a/orchestra/contrib/systemusers/backends.py
+++ b/orchestra/contrib/systemusers/backends.py
@@ -56,12 +56,12 @@ class UNIXUserBackend(ServiceController):
         self.append(textwrap.dedent("""\
             { sleep 2 && killall -u %(user)s -s KILL; } &
             killall -u %(user)s || true
-            userdel %(user)s || exit_code=1
-            groupdel %(group)s || exit_code=1
+            userdel %(user)s || exit_code=$?
+            groupdel %(group)s || exit_code=$?
             """) % context
         )
         if context['deleted_home']:
-            self.append("mv %(base_home)s %(deleted_home)s || exit_code=1" % context)
+            self.append("mv %(base_home)s %(deleted_home)s || exit_code=$?" % context)
         else:
             self.append("rm -fr %(base_home)s" % context)
     
diff --git a/orchestra/contrib/systemusers/settings.py b/orchestra/contrib/systemusers/settings.py
index bb658276..8266c83d 100644
--- a/orchestra/contrib/systemusers/settings.py
+++ b/orchestra/contrib/systemusers/settings.py
@@ -1,9 +1,9 @@
-from django.conf import settings
-
 from django.utils.translation import ugettext_lazy as _
 
+from orchestra.settings import Setting
 
-SYSTEMUSERS_SHELLS = getattr(settings, 'SYSTEMUSERS_SHELLS', (
+
+SYSTEMUSERS_SHELLS = Setting('SYSTEMUSERS_SHELLS', (
     ('/dev/null', _("No shell, FTP only")),
     ('/bin/rssh', _("No shell, SFTP/RSYNC only")),
     ('/bin/bash', "/bin/bash"),
@@ -11,36 +11,36 @@ SYSTEMUSERS_SHELLS = getattr(settings, 'SYSTEMUSERS_SHELLS', (
 ))
 
 
-SYSTEMUSERS_DEFAULT_SHELL = getattr(settings, 'SYSTEMUSERS_DEFAULT_SHELL',
-    '/dev/null'
+SYSTEMUSERS_DEFAULT_SHELL = Setting('SYSTEMUSERS_DEFAULT_SHELL', '/dev/null',
+    choices=SYSTEMUSERS_SHELLS
 )
 
 
-SYSTEMUSERS_DISABLED_SHELLS = getattr(settings, 'SYSTEMUSERS_DISABLED_SHELLS', (
+SYSTEMUSERS_DISABLED_SHELLS = Setting('SYSTEMUSERS_DISABLED_SHELLS', (
     '/dev/null',
     '/bin/rssh',
 ))
 
 
-SYSTEMUSERS_HOME = getattr(settings, 'SYSTEMUSERS_HOME',
+SYSTEMUSERS_HOME = Setting('SYSTEMUSERS_HOME',
     '/home/%(user)s'
 )
 
 
-SYSTEMUSERS_FTP_LOG_PATH = getattr(settings, 'SYSTEMUSERS_FTP_LOG_PATH',
+SYSTEMUSERS_FTP_LOG_PATH = Setting('SYSTEMUSERS_FTP_LOG_PATH',
     '/var/log/vsftpd.log'
 )
 
 
-SYSTEMUSERS_MAIL_LOG_PATH = getattr(settings, 'SYSTEMUSERS_MAIL_LOG_PATH',
+SYSTEMUSERS_MAIL_LOG_PATH = Setting('SYSTEMUSERS_MAIL_LOG_PATH',
     '/var/log/exim4/mainlog'
 )
 
-SYSTEMUSERS_DEFAULT_GROUP_MEMBERS = getattr(settings, 'SYSTEMUSERS_DEFAULT_GROUP_MEMBERS',
+SYSTEMUSERS_DEFAULT_GROUP_MEMBERS = Setting('SYSTEMUSERS_DEFAULT_GROUP_MEMBERS',
     ('www-data',)
 )
 
 
-SYSTEMUSERS_MOVE_ON_DELETE_PATH = getattr(settings, 'SYSTEMUSERS_MOVE_ON_DELETE_PATH',
+SYSTEMUSERS_MOVE_ON_DELETE_PATH = Setting('SYSTEMUSERS_MOVE_ON_DELETE_PATH',
     ''
 )
diff --git a/orchestra/contrib/vps/settings.py b/orchestra/contrib/vps/settings.py
index d6022c12..7e1b45e9 100644
--- a/orchestra/contrib/vps/settings.py
+++ b/orchestra/contrib/vps/settings.py
@@ -1,21 +1,17 @@
-from django.conf import settings
+from orchestra.settings import Setting
 
 
-VPS_TYPES = getattr(settings, 'VPS_TYPES', (
+VPS_TYPES = Setting('VPS_TYPES', (
     ('openvz', 'OpenVZ container'),
 ))
 
 
-VPS_DEFAULT_TYPE = getattr(settings, 'VPS_DEFAULT_TYPE',
-    'openvz'
-)
+VPS_DEFAULT_TYPE = Setting('VPS_DEFAULT_TYPE', 'openvz', choices=VPS_TYPES)
 
 
-VPS_TEMPLATES = getattr(settings, 'VPS_TEMPLATES', (
+VPS_TEMPLATES = Setting('VPS_TEMPLATES', (
     ('debian7', 'Debian 7 - Wheezy'),
 ))
 
 
-VPS_DEFAULT_TEMPLATE = getattr(settings, 'VPS_DEFAULT_TEMPLATE',
-    'debian7'
-)
+VPS_DEFAULT_TEMPLATE = Setting('VPS_DEFAULT_TEMPLATE', 'debian7', choices=VPS_TEMPLATES)
diff --git a/orchestra/contrib/webapps/backends/__init__.py b/orchestra/contrib/webapps/backends/__init__.py
index 9b9fa1ae..eff5939d 100644
--- a/orchestra/contrib/webapps/backends/__init__.py
+++ b/orchestra/contrib/webapps/backends/__init__.py
@@ -36,7 +36,7 @@ class WebAppServiceMixin(object):
     
     def delete_webapp_dir(self, context):
         if context['deleted_app_path']:
-            self.append("mv %(app_path)s %(deleted_app_path)s || exit_code=1" % context)
+            self.append("mv %(app_path)s %(deleted_app_path)s || exit_code=$?" % context)
         else:
             self.append("rm -fr %(app_path)s" % context)
     
diff --git a/orchestra/contrib/webapps/settings.py b/orchestra/contrib/webapps/settings.py
index 88a63cee..90cbeca9 100644
--- a/orchestra/contrib/webapps/settings.py
+++ b/orchestra/contrib/webapps/settings.py
@@ -1,37 +1,37 @@
-from django.conf import settings
+from orchestra.settings import ORCHESTRA_BASE_DOMAIN, Setting
 
-from orchestra.settings import ORCHESTRA_BASE_DOMAIN
+from .. import webapps
 
 
-WEBAPPS_BASE_DIR = getattr(settings, 'WEBAPPS_BASE_DIR',
+WEBAPPS_BASE_DIR = Setting('WEBAPPS_BASE_DIR',
     '%(home)s/webapps/%(app_name)s'
 )
 
 
-WEBAPPS_FPM_LISTEN = getattr(settings, 'WEBAPPS_FPM_LISTEN',
+WEBAPPS_FPM_LISTEN = Setting('WEBAPPS_FPM_LISTEN',
     # '127.0.0.1:9%(app_id)03d
     '/opt/php/5.4/socks/%(user)s-%(app_name)s.sock'
 )
 
 
-WEBAPPS_FPM_DEFAULT_MAX_CHILDREN = getattr(settings, 'WEBAPPS_FPM_DEFAULT_MAX_CHILDREN',
+WEBAPPS_FPM_DEFAULT_MAX_CHILDREN = Setting('WEBAPPS_FPM_DEFAULT_MAX_CHILDREN',
     3
 )
 
 
-WEBAPPS_PHPFPM_POOL_PATH = getattr(settings, 'WEBAPPS_PHPFPM_POOL_PATH',
+WEBAPPS_PHPFPM_POOL_PATH = Setting('WEBAPPS_PHPFPM_POOL_PATH',
     '/etc/php5/fpm/pool.d/%(user)s-%(app_name)s.conf'
 )
 
 
-WEBAPPS_FCGID_WRAPPER_PATH = getattr(settings, 'WEBAPPS_FCGID_WRAPPER_PATH',
+WEBAPPS_FCGID_WRAPPER_PATH = Setting('WEBAPPS_FCGID_WRAPPER_PATH',
     # Inside SuExec Document root
     # Make sure all account wrappers are in the same DIR
     '/home/httpd/fcgi-bin.d/%(user)s/%(app_name)s-wrapper'
 )
 
 
-WEBAPPS_FCGID_CMD_OPTIONS_PATH = getattr(settings, 'WEBAPPS_FCGID_CMD_OPTIONS_PATH',
+WEBAPPS_FCGID_CMD_OPTIONS_PATH = Setting('WEBAPPS_FCGID_CMD_OPTIONS_PATH',
     # Loaded by Apache
     '/etc/apache2/fcgid-conf/%(user)s-%(app_name)s.conf'
 )
@@ -39,33 +39,37 @@ WEBAPPS_FCGID_CMD_OPTIONS_PATH = getattr(settings, 'WEBAPPS_FCGID_CMD_OPTIONS_PA
 
 # Greater or equal to your FcgidMaxRequestsPerProcess
 # http://httpd.apache.org/mod_fcgid/mod/mod_fcgid.html#examples
-WEBAPPS_PHP_MAX_REQUESTS = getattr(settings, 'WEBAPPS_PHP_MAX_REQUESTS',
+WEBAPPS_PHP_MAX_REQUESTS = Setting('WEBAPPS_PHP_MAX_REQUESTS',
     400
 )
 
 
-WEBAPPS_PHP_ERROR_LOG_PATH = getattr(settings, 'WEBAPPS_PHP_ERROR_LOG_PATH',
+WEBAPPS_PHP_ERROR_LOG_PATH = Setting('WEBAPPS_PHP_ERROR_LOG_PATH',
     ''
 )
 
 
-WEBAPPS_MERGE_PHP_WEBAPPS = getattr(settings, 'WEBAPPS_MERGE_PHP_WEBAPPS',
+WEBAPPS_MERGE_PHP_WEBAPPS = Setting('WEBAPPS_MERGE_PHP_WEBAPPS',
     # Combine all fcgid-wrappers/fpm-pools into one per account-php_version
     # to better control num processes per account and save memory
     False)
 
 
-WEBAPPS_TYPES = getattr(settings, 'WEBAPPS_TYPES', (
-    'orchestra.contrib.webapps.types.php.PHPApp',
-    'orchestra.contrib.webapps.types.misc.StaticApp',
-    'orchestra.contrib.webapps.types.misc.WebalizerApp',
-    'orchestra.contrib.webapps.types.misc.SymbolicLinkApp',
-    'orchestra.contrib.webapps.types.wordpress.WordPressApp',
-    'orchestra.contrib.webapps.types.python.PythonApp',
-))
+WEBAPPS_TYPES = Setting('WEBAPPS_TYPES', (
+        'orchestra.contrib.webapps.types.php.PHPApp',
+        'orchestra.contrib.webapps.types.misc.StaticApp',
+        'orchestra.contrib.webapps.types.misc.WebalizerApp',
+        'orchestra.contrib.webapps.types.misc.SymbolicLinkApp',
+        'orchestra.contrib.webapps.types.wordpress.WordPressApp',
+        'orchestra.contrib.webapps.types.python.PythonApp',
+    ),
+    # lazy loading
+    choices=lambda : ((t.get_class_path(), t.get_class_path()) for t in webapps.types.AppType.get_plugins()),
+    multiple=True,
+)
 
 
-WEBAPPS_PHP_VERSIONS = getattr(settings, 'WEBAPPS_PHP_VERSIONS', (
+WEBAPPS_PHP_VERSIONS = Setting('WEBAPPS_PHP_VERSIONS', (
     # Execution modle choose by ending -fpm or -cgi
     ('5.4-fpm', 'PHP 5.4 FPM'),
     ('5.4-cgi', 'PHP 5.4 FCGID'),
@@ -75,69 +79,68 @@ WEBAPPS_PHP_VERSIONS = getattr(settings, 'WEBAPPS_PHP_VERSIONS', (
 ))
 
 
-WEBAPPS_DEFAULT_PHP_VERSION = getattr(settings, 'WEBAPPS_DEFAULT_PHP_VERSION',
-    '5.4-cgi'
+WEBAPPS_DEFAULT_PHP_VERSION = Setting('WEBAPPS_DEFAULT_PHP_VERSION', '5.4-cgi',
+    choices=WEBAPPS_PHP_VERSIONS
 )
 
 
-WEBAPPS_PHP_CGI_BINARY_PATH = getattr(settings, 'WEBAPPS_PHP_CGI_BINARY_PATH',
+WEBAPPS_PHP_CGI_BINARY_PATH = Setting('WEBAPPS_PHP_CGI_BINARY_PATH',
     # Path of the cgi binary used by fcgid
     '/usr/bin/php%(php_version_number)s-cgi'
 )
 
 
-WEBAPPS_PHP_CGI_RC_DIR = getattr(settings, 'WEBAPPS_PHP_CGI_RC_DIR',
+WEBAPPS_PHP_CGI_RC_DIR = Setting('WEBAPPS_PHP_CGI_RC_DIR',
     # Path to php.ini
     '/etc/php%(php_version_number)s/cgi/'
 )
 
 
-WEBAPPS_PHP_CGI_INI_SCAN_DIR = getattr(settings, 'WEBAPPS_PHP_CGI_INI_SCAN_DIR',
+WEBAPPS_PHP_CGI_INI_SCAN_DIR = Setting('WEBAPPS_PHP_CGI_INI_SCAN_DIR',
     # Path to php.ini
     '/etc/php%(php_version_number)s/cgi/conf.d'
 )
 
 
-WEBAPPS_PYTHON_VERSIONS = getattr(settings, 'WEBAPPS_PYTHON_VERSIONS', (
+WEBAPPS_PYTHON_VERSIONS = Setting('WEBAPPS_PYTHON_VERSIONS', (
     ('3.4-uwsgi', 'Python 3.4 uWSGI'),
     ('2.7-uwsgi', 'Python 2.7 uWSGI'),
 ))
 
 
-WEBAPPS_DEFAULT_PYTHON_VERSION = getattr(settings, 'WEBAPPS_DEFAULT_PYTHON_VERSION',
-    '3.4-uwsgi'
+WEBAPPS_DEFAULT_PYTHON_VERSION = Setting('WEBAPPS_DEFAULT_PYTHON_VERSION', '3.4-uwsgi',
+    choices=WEBAPPS_PYTHON_VERSIONS
 )
 
 
-WEBAPPS_UWSGI_SOCKET = getattr(settings, 'WEBAPPS_UWSGI_SOCKET',
+WEBAPPS_UWSGI_SOCKET = Setting('WEBAPPS_UWSGI_SOCKET',
     '/var/run/uwsgi/app/%(app_name)s/socket'
 )
 
 
-WEBAPPS_UWSGI_BASE_DIR = getattr(settings, 'WEBAPPS_UWSGI_BASE_DIR',
+WEBAPPS_UWSGI_BASE_DIR = Setting('WEBAPPS_UWSGI_BASE_DIR',
     '/etc/uwsgi/'
 )
 
 
-WEBAPPS_PYTHON_MAX_REQUESTS = getattr(settings, 'WEBAPPS_PYTHON_MAX_REQUESTS',
+WEBAPPS_PYTHON_MAX_REQUESTS = Setting('WEBAPPS_PYTHON_MAX_REQUESTS',
     500
 )
 
 
-WEBAPPS_PYTHON_DEFAULT_MAX_WORKERS = getattr(settings, 'WEBAPPS_PYTHON_DEFAULT_MAX_WORKERS',
+WEBAPPS_PYTHON_DEFAULT_MAX_WORKERS = Setting('WEBAPPS_PYTHON_DEFAULT_MAX_WORKERS',
     3
 )
 
 
-WEBAPPS_PYTHON_DEFAULT_TIMEOUT = getattr(settings, 'WEBAPPS_PYTHON_DEFAULT_TIMEOUT',
+WEBAPPS_PYTHON_DEFAULT_TIMEOUT = Setting('WEBAPPS_PYTHON_DEFAULT_TIMEOUT',
     30
 )
 
 
-WEBAPPS_UNDER_CONSTRUCTION_PATH = getattr(settings, 'WEBAPPS_UNDER_CONSTRUCTION_PATH',
-    # Server-side path where a under construction stock page is
-    # '/var/www/undercontruction/index.html',
-    ''
+WEBAPPS_UNDER_CONSTRUCTION_PATH = Setting('WEBAPPS_UNDER_CONSTRUCTION_PATH', '',
+    help_text=("Server-side path where a under construction stock page is "
+               "'/var/www/undercontruction/index.html'")
 )
 
 
@@ -150,7 +153,7 @@ WEBAPPS_UNDER_CONSTRUCTION_PATH = getattr(settings, 'WEBAPPS_UNDER_CONSTRUCTION_
 
 
 
-WEBAPPS_PHP_DISABLED_FUNCTIONS = getattr(settings, 'WEBAPPS_PHP_DISABLED_FUNCTION', [
+WEBAPPS_PHP_DISABLED_FUNCTIONS = Setting('WEBAPPS_PHP_DISABLED_FUNCTION', [
     'exec',
     'passthru',
     'shell_exec',
@@ -174,49 +177,53 @@ WEBAPPS_PHP_DISABLED_FUNCTIONS = getattr(settings, 'WEBAPPS_PHP_DISABLED_FUNCTIO
 ])
 
 
-WEBAPPS_ENABLED_OPTIONS = getattr(settings, 'WEBAPPS_ENABLED_OPTIONS', (
-    'orchestra.contrib.webapps.options.PublicRoot',
-    'orchestra.contrib.webapps.options.Timeout',
-    'orchestra.contrib.webapps.options.Processes',
-    'orchestra.contrib.webapps.options.PHPEnableFunctions',
-    'orchestra.contrib.webapps.options.PHPAllowURLInclude',
-    'orchestra.contrib.webapps.options.PHPAllowURLFopen',
-    'orchestra.contrib.webapps.options.PHPAutoAppendFile',
-    'orchestra.contrib.webapps.options.PHPAutoPrependFile',
-    'orchestra.contrib.webapps.options.PHPDateTimeZone',
-    'orchestra.contrib.webapps.options.PHPDefaultSocketTimeout',
-    'orchestra.contrib.webapps.options.PHPDisplayErrors',
-    'orchestra.contrib.webapps.options.PHPExtension',
-    'orchestra.contrib.webapps.options.PHPMagicQuotesGPC',
-    'orchestra.contrib.webapps.options.PHPMagicQuotesRuntime',
-    'orchestra.contrib.webapps.options.PHPMaginQuotesSybase',
-    'orchestra.contrib.webapps.options.PHPMaxInputTime',
-    'orchestra.contrib.webapps.options.PHPMaxInputVars',
-    'orchestra.contrib.webapps.options.PHPMemoryLimit',
-    'orchestra.contrib.webapps.options.PHPMySQLConnectTimeout',
-    'orchestra.contrib.webapps.options.PHPOutputBuffering',
-    'orchestra.contrib.webapps.options.PHPRegisterGlobals',
-    'orchestra.contrib.webapps.options.PHPPostMaxSize',
-    'orchestra.contrib.webapps.options.PHPSendmailPath',
-    'orchestra.contrib.webapps.options.PHPSessionBugCompatWarn',
-    'orchestra.contrib.webapps.options.PHPSessionAutoStart',
-    'orchestra.contrib.webapps.options.PHPSafeMode',
-    'orchestra.contrib.webapps.options.PHPSuhosinPostMaxVars',
-    'orchestra.contrib.webapps.options.PHPSuhosinGetMaxVars',
-    'orchestra.contrib.webapps.options.PHPSuhosinRequestMaxVars',
-    'orchestra.contrib.webapps.options.PHPSuhosinSessionEncrypt',
-    'orchestra.contrib.webapps.options.PHPSuhosinSimulation',
-    'orchestra.contrib.webapps.options.PHPSuhosinExecutorIncludeWhitelist',
-    'orchestra.contrib.webapps.options.PHPUploadMaxFileSize',
-    'orchestra.contrib.webapps.options.PHPZendExtension',
-))
+WEBAPPS_ENABLED_OPTIONS = Setting('WEBAPPS_ENABLED_OPTIONS', (
+        'orchestra.contrib.webapps.options.PublicRoot',
+        'orchestra.contrib.webapps.options.Timeout',
+        'orchestra.contrib.webapps.options.Processes',
+        'orchestra.contrib.webapps.options.PHPEnableFunctions',
+        'orchestra.contrib.webapps.options.PHPAllowURLInclude',
+        'orchestra.contrib.webapps.options.PHPAllowURLFopen',
+        'orchestra.contrib.webapps.options.PHPAutoAppendFile',
+        'orchestra.contrib.webapps.options.PHPAutoPrependFile',
+        'orchestra.contrib.webapps.options.PHPDateTimeZone',
+        'orchestra.contrib.webapps.options.PHPDefaultSocketTimeout',
+        'orchestra.contrib.webapps.options.PHPDisplayErrors',
+        'orchestra.contrib.webapps.options.PHPExtension',
+        'orchestra.contrib.webapps.options.PHPMagicQuotesGPC',
+        'orchestra.contrib.webapps.options.PHPMagicQuotesRuntime',
+        'orchestra.contrib.webapps.options.PHPMaginQuotesSybase',
+        'orchestra.contrib.webapps.options.PHPMaxInputTime',
+        'orchestra.contrib.webapps.options.PHPMaxInputVars',
+        'orchestra.contrib.webapps.options.PHPMemoryLimit',
+        'orchestra.contrib.webapps.options.PHPMySQLConnectTimeout',
+        'orchestra.contrib.webapps.options.PHPOutputBuffering',
+        'orchestra.contrib.webapps.options.PHPRegisterGlobals',
+        'orchestra.contrib.webapps.options.PHPPostMaxSize',
+        'orchestra.contrib.webapps.options.PHPSendmailPath',
+        'orchestra.contrib.webapps.options.PHPSessionBugCompatWarn',
+        'orchestra.contrib.webapps.options.PHPSessionAutoStart',
+        'orchestra.contrib.webapps.options.PHPSafeMode',
+        'orchestra.contrib.webapps.options.PHPSuhosinPostMaxVars',
+        'orchestra.contrib.webapps.options.PHPSuhosinGetMaxVars',
+        'orchestra.contrib.webapps.options.PHPSuhosinRequestMaxVars',
+        'orchestra.contrib.webapps.options.PHPSuhosinSessionEncrypt',
+        'orchestra.contrib.webapps.options.PHPSuhosinSimulation',
+        'orchestra.contrib.webapps.options.PHPSuhosinExecutorIncludeWhitelist',
+        'orchestra.contrib.webapps.options.PHPUploadMaxFileSize',
+        'orchestra.contrib.webapps.options.PHPZendExtension',
+    ),
+    # lazy loading
+    choices=lambda : ((o.get_class_path(), o.get_class_path()) for o in webapps.options.AppOption.get_plugins()),
+    multiple=True,
+)
 
 
-WEBAPPS_DEFAULT_MYSQL_DATABASE_HOST = getattr(settings, 'WEBAPPS_DEFAULT_MYSQL_DATABASE_HOST',
+WEBAPPS_DEFAULT_MYSQL_DATABASE_HOST = Setting('WEBAPPS_DEFAULT_MYSQL_DATABASE_HOST',
     'mysql.{}'.format(ORCHESTRA_BASE_DOMAIN)
 )
 
 
-WEBAPPS_MOVE_ON_DELETE_PATH = getattr(settings, 'WEBAPPS_MOVE_ON_DELETE_PATH',
+WEBAPPS_MOVE_ON_DELETE_PATH = Setting('WEBAPPS_MOVE_ON_DELETE_PATH',
     ''
 )
diff --git a/orchestra/contrib/websites/backends/apache.py b/orchestra/contrib/websites/backends/apache.py
index d3464a5d..3b60f784 100644
--- a/orchestra/contrib/websites/backends/apache.py
+++ b/orchestra/contrib/websites/backends/apache.py
@@ -14,7 +14,7 @@ from ..utils import normurlpath
 
 class Apache2Backend(ServiceController):
     """
-    Apache 2.4 backend with support for the following directives:
+    Apache &ge;2.4 backend with support for the following directives:
         <tt>static</tt>, <tt>location</tt>, <tt>fpm</tt>, <tt>fcgid</tt>, <tt>uwsgi</tt>, \
         <tt>ssl</tt>, <tt>security</tt>, <tt>redirects</tt>, <tt>proxies</tt>, <tt>saas</tt>
     """
@@ -24,6 +24,7 @@ class Apache2Backend(ServiceController):
     model = 'websites.Website'
     related_models = (
         ('websites.Content', 'website'),
+        ('websites.WebsiteDirective', 'directives'),
         ('webapps.WebApp', 'website_set'),
     )
     verbose_name = _("Apache 2")
diff --git a/orchestra/contrib/websites/settings.py b/orchestra/contrib/websites/settings.py
index fd33798d..82a141a0 100644
--- a/orchestra/contrib/websites/settings.py
+++ b/orchestra/contrib/websites/settings.py
@@ -1,8 +1,11 @@
-from django.conf import settings
 from django.utils.translation import ugettext_lazy as _
 
+from orchestra.settings import Setting
 
-WEBSITES_UNIQUE_NAME_FORMAT = getattr(settings, 'WEBSITES_UNIQUE_NAME_FORMAT',
+from .. import websites
+
+
+WEBSITES_UNIQUE_NAME_FORMAT = Setting('WEBSITES_UNIQUE_NAME_FORMAT',
     '%(user)s-%(site_name)s'
 )
 
@@ -14,64 +17,68 @@ WEBSITES_UNIQUE_NAME_FORMAT = getattr(settings, 'WEBSITES_UNIQUE_NAME_FORMAT',
 #))
 
 
-WEBSITES_PROTOCOL_CHOICES = getattr(settings, 'WEBSITES_PROTOCOL_CHOICES', (
+WEBSITES_PROTOCOL_CHOICES = Setting('WEBSITES_PROTOCOL_CHOICES', (
     ('http', "HTTP"),
     ('https', "HTTPS"),
     ('http/https', _("HTTP and HTTPS")),
     ('https-only', _("HTTPS only")),
 ))
 
-WEBSITES_DEFAULT_PROTOCOL = getattr(settings, 'WEBSITES_DEFAULT_PROTOCOL',
-    'http'
+WEBSITES_DEFAULT_PROTOCOL = Setting('WEBSITES_DEFAULT_PROTOCOL', 'http',
+    choices=WEBSITES_PROTOCOL_CHOICES
 )
 
 
-WEBSITES_DEFAULT_IPS = getattr(settings, 'WEBSITES_DEFAULT_IPS', (
-    '*'
+WEBSITES_DEFAULT_IPS = Setting('WEBSITES_DEFAULT_IPS', (
+    '*',
 ))
 
 
-WEBSITES_DOMAIN_MODEL = getattr(settings, 'WEBSITES_DOMAIN_MODEL',
+WEBSITES_DOMAIN_MODEL = Setting('WEBSITES_DOMAIN_MODEL',
     'domains.Domain'
 )
 
 
-WEBSITES_ENABLED_DIRECTIVES = getattr(settings, 'WEBSITES_ENABLED_DIRECTIVES', (
-    'orchestra.contrib.websites.directives.Redirect',
-    'orchestra.contrib.websites.directives.Proxy',
-    'orchestra.contrib.websites.directives.ErrorDocument',
-    'orchestra.contrib.websites.directives.SSLCA',
-    'orchestra.contrib.websites.directives.SSLCert',
-    'orchestra.contrib.websites.directives.SSLKey',
-    'orchestra.contrib.websites.directives.SecRuleRemove',
-    'orchestra.contrib.websites.directives.SecEngine',
-    'orchestra.contrib.websites.directives.WordPressSaaS',
-    'orchestra.contrib.websites.directives.DokuWikiSaaS',
-    'orchestra.contrib.websites.directives.DrupalSaaS',
-))
+WEBSITES_ENABLED_DIRECTIVES = Setting('WEBSITES_ENABLED_DIRECTIVES', (
+        'orchestra.contrib.websites.directives.Redirect',
+        'orchestra.contrib.websites.directives.Proxy',
+        'orchestra.contrib.websites.directives.ErrorDocument',
+        'orchestra.contrib.websites.directives.SSLCA',
+        'orchestra.contrib.websites.directives.SSLCert',
+        'orchestra.contrib.websites.directives.SSLKey',
+        'orchestra.contrib.websites.directives.SecRuleRemove',
+        'orchestra.contrib.websites.directives.SecEngine',
+        'orchestra.contrib.websites.directives.WordPressSaaS',
+        'orchestra.contrib.websites.directives.DokuWikiSaaS',
+        'orchestra.contrib.websites.directives.DrupalSaaS',
+    ),
+    # lazy loading
+    choices=lambda : ((d.get_class_path(), d.get_class_path()) for d in websites.directives.SiteDirective.get_plugins()),
+    multiple=True,
+)
 
 
-WEBSITES_BASE_APACHE_CONF = getattr(settings, 'WEBSITES_BASE_APACHE_CONF',
+WEBSITES_BASE_APACHE_CONF = Setting('WEBSITES_BASE_APACHE_CONF',
     '/etc/apache2/'
 )
 
 
-WEBSITES_WEBALIZER_PATH = getattr(settings, 'WEBSITES_WEBALIZER_PATH',
+WEBSITES_WEBALIZER_PATH = Setting('WEBSITES_WEBALIZER_PATH',
     '/home/httpd/webalizer/'
 )
 
 
-WEBSITES_WEBSITE_WWW_ACCESS_LOG_PATH = getattr(settings, 'WEBSITES_WEBSITE_WWW_ACCESS_LOG_PATH',
+WEBSITES_WEBSITE_WWW_ACCESS_LOG_PATH = Setting('WEBSITES_WEBSITE_WWW_ACCESS_LOG_PATH',
     '/var/log/apache2/virtual/%(unique_name)s.log'
 )
 
 
-WEBSITES_WEBSITE_WWW_ERROR_LOG_PATH = getattr(settings, 'WEBSITES_WEBSITE_WWW_ERROR_LOG_PATH',
+WEBSITES_WEBSITE_WWW_ERROR_LOG_PATH = Setting('WEBSITES_WEBSITE_WWW_ERROR_LOG_PATH',
     ''
 )
 
 
-WEBSITES_TRAFFIC_IGNORE_HOSTS = getattr(settings, 'WEBSITES_TRAFFIC_IGNORE_HOSTS',
+WEBSITES_TRAFFIC_IGNORE_HOSTS = Setting('WEBSITES_TRAFFIC_IGNORE_HOSTS',
     ('127.0.0.1',)
 )
 
@@ -86,26 +93,28 @@ WEBSITES_TRAFFIC_IGNORE_HOSTS = getattr(settings, 'WEBSITES_TRAFFIC_IGNORE_HOSTS
 #    '')
 
 
-WEBSITES_SAAS_DIRECTIVES = getattr(settings, 'WEBSITES_SAAS_DIRECTIVES', {
+WEBSITES_SAAS_DIRECTIVES = Setting('WEBSITES_SAAS_DIRECTIVES', {
     'wordpress-saas': ('fpm', '/opt/php/5.4/socks/pangea.sock', '/home/httpd/wordpress-mu/'),
     'drupal-saas': ('fpm', '/opt/php/5.4/socks/pangea.sock','/home/httpd/drupal-mu/'),
     'dokuwiki-saas': ('fpm', '/opt/php/5.4/socks/pangea.sock','/home/httpd/moodle-mu/'),
 })
 
 
-WEBSITES_DEFAULT_SSL_CERT = getattr(settings, 'WEBSITES_DEFAULT_SSL_CERT',
+WEBSITES_DEFAULT_SSL_CERT = Setting('WEBSITES_DEFAULT_SSL_CERT',
     ''
 )
 
-WEBSITES_DEFAULT_SSL_KEY = getattr(settings, 'WEBSITES_DEFAULT_SSL_KEY',
+WEBSITES_DEFAULT_SSL_KEY = Setting('WEBSITES_DEFAULT_SSL_KEY',
     ''
 )
 
-WEBSITES_DEFAULT_SSL_CA = getattr(settings, 'WEBSITES_DEFAULT_SSL_CA',
+WEBSITES_DEFAULT_SSL_CA = Setting('WEBSITES_DEFAULT_SSL_CA',
     ''
 )
 
-WEBSITES_VHOST_EXTRA_DIRECTIVES = getattr(settings, 'WEBSITES_VHOST_EXTRA_DIRECTIVES', (
-    # (<location>, <directive>),
-    # ('/cgi-bin/', 'ScriptAlias /cgi-bin/ %(home)s/cgi-bin/'),
-))
+WEBSITES_VHOST_EXTRA_DIRECTIVES = Setting('WEBSITES_VHOST_EXTRA_DIRECTIVES', (),
+    help_text=(
+        "(<location>, <directive>), <br>"
+        "i.e. ('/cgi-bin/', 'ScriptAlias /cgi-bin/ %(home)s/cgi-bin/')"
+    )
+)
diff --git a/orchestra/forms/fields.py b/orchestra/forms/fields.py
index af65d2bd..ee383dc6 100644
--- a/orchestra/forms/fields.py
+++ b/orchestra/forms/fields.py
@@ -1,5 +1,7 @@
 from django import forms
 
+from .widgets import SpanWidget
+
 
 class MultiSelectFormField(forms.MultipleChoiceField):
     """ http://djangosnippets.org/snippets/1200/ """
@@ -13,3 +15,15 @@ class MultiSelectFormField(forms.MultipleChoiceField):
         if not value and self.required:
             raise forms.ValidationError(self.error_messages['required'])
         return value
+
+
+class SpanField(forms.Field):
+    """
+    A field which renders a value wrapped in a <span> tag.
+    
+    Requires use of specific form support. (see ReadonlyForm or ReadonlyModelForm)
+    """
+    
+    def __init__(self, *args, **kwargs):
+        kwargs['widget'] = kwargs.get('widget', SpanWidget)
+        super(SpanField, self).__init__(*args, **kwargs)
diff --git a/orchestra/forms/options.py b/orchestra/forms/options.py
index d82c13fc..0404275d 100644
--- a/orchestra/forms/options.py
+++ b/orchestra/forms/options.py
@@ -6,6 +6,9 @@ from orchestra.utils.python import random_ascii
 
 from ..core.validators import validate_password
 
+from .fields import SpanField
+from .widgets import SpanWidget
+
 
 class UserCreationForm(forms.ModelForm):
     """
@@ -65,3 +68,24 @@ class UserChangeForm(forms.ModelForm):
         # This is done here, rather than on the field, because the
         # field does not have access to the initial value
         return self.initial["password"]
+
+
+class ReadOnlyFormMixin(object):
+    """
+    Mixin class for ModelForm or Form that provides support for SpanField on readonly fields
+    Meta:
+        readonly_fileds = (ro_field1, ro_field2)
+    """
+    def __init__(self, *args, **kwargs):
+        super(ReadOnlyFormMixin, self).__init__(*args, **kwargs)
+        for name in self.Meta.readonly_fields:
+            field = self.fields[name]
+            if not isinstance(field, SpanField):
+                field.widget = SpanWidget()
+                if hasattr(self, 'instance'):
+                    # Model form
+                    original_value = str(getattr(self.instance, name))
+                else:
+                    original_value = str(self.initial.get(name))
+                field.widget.original_value = original_value
+
diff --git a/orchestra/forms/widgets.py b/orchestra/forms/widgets.py
index edb70980..63317a27 100644
--- a/orchestra/forms/widgets.py
+++ b/orchestra/forms/widgets.py
@@ -5,10 +5,40 @@ from django import forms
 from django.utils.safestring import mark_safe
 from django.utils.encoding import force_text
 
+from django.contrib.admin.templatetags.admin_static import static
+
+# TODO rename readonlywidget
+class SpanWidget(forms.Widget):
+    """
+    Renders a value wrapped in a <span> tag.
+    Requires use of specific form support. (see ReadonlyForm or ReadonlyModelForm)
+    """
+    
+    def __init__(self, *args, **kwargs):
+        self.tag = kwargs.pop('tag', '<span>')
+        super(SpanWidget, self).__init__(*args, **kwargs)
+    
+    def render(self, name, value, attrs=None):
+        final_attrs = self.build_attrs(attrs, name=name)
+        original_value = self.original_value
+        # Display icon
+        if original_value in ('True', 'False') or isinstance(original_value, bool):
+            icon = static('admin/img/icon-%s.gif' % 'yes' if original_value else 'no')
+            return mark_safe('<img src="%s" alt="%s">' % (icon, str(original_value)))
+        tag = self.tag[:-1]
+        endtag = '/'.join((self.tag[0], self.tag[1:]))
+        return mark_safe('%s%s >%s%s' % (tag, forms.util.flatatt(final_attrs), original_value, endtag))
+    
+    def value_from_datadict(self, data, files, name):
+        return self.original_value
+    
+    def _has_changed(self, initial, data):
+        return False
+
 
 class ShowTextWidget(forms.Widget):
     def __init__(self, *args, **kwargs):
-        for kwarg in ['bold', 'warning', 'hidden']:
+        for kwarg in ['tag', 'warning', 'hidden']:
             setattr(self, kwarg, kwargs.pop(kwarg, False))
         super(ShowTextWidget, self).__init__(*args, **kwargs)
     
@@ -18,8 +48,9 @@ class ShowTextWidget(forms.Widget):
             return ''
         if hasattr(self, 'initial'):
             value = self.initial
-        if self.bold: 
-            final_value = '<b>%s</b>' % (value)
+        if self.tag:
+            endtag = '/'.join((self.tag[0], self.tag[1:]))
+            final_value = ''.join((self.tag, value, endtag))
         else:
             final_value = '<br/>'.join(value.split('\n'))
         if self.warning:
diff --git a/orchestra/management/commands/startservices.py b/orchestra/management/commands/startservices.py
index be97e5b2..7566acf0 100644
--- a/orchestra/management/commands/startservices.py
+++ b/orchestra/management/commands/startservices.py
@@ -19,7 +19,7 @@ def run_tuple(services, action, options, optional=False):
 
 
 def flatten(nested, depth=0):
-    if hasattr(nested, '__iter__'):
+    if isinstance(nested, (list, tuple)):
         for sublist in nested:
             for element in flatten(sublist, depth+1):
                 yield element
diff --git a/orchestra/plugins/options.py b/orchestra/plugins/options.py
index 2ee9c249..7d0c5ca2 100644
--- a/orchestra/plugins/options.py
+++ b/orchestra/plugins/options.py
@@ -55,6 +55,10 @@ class Plugin(object):
     def get_change_readonly_fileds(cls):
         return cls.change_readonly_fileds
     
+    @classmethod
+    def get_class_path(cls):
+        return '.'.join((cls.__module__, cls.__name__))
+    
     def clean_data(self):
         """ model clean, uses cls.serizlier by default """
         if self.serializer:
diff --git a/orchestra/settings.py b/orchestra/settings.py
index ad0b32b5..477c26b2 100644
--- a/orchestra/settings.py
+++ b/orchestra/settings.py
@@ -1,58 +1,100 @@
+from collections import OrderedDict
+
 from django.conf import settings
 from django.utils.translation import ugettext_lazy as _
 
 
-# Domain name used when it will not be possible to infere the domain from a request
-# For example in periodic tasks
-ORCHESTRA_SITE_URL = getattr(settings, 'ORCHESTRA_SITE_URL',
-    'http://localhost'
-)
+class Setting(object):
+    """
+    Keeps track of the defined settings.
+    Instances of this class are the native value of the setting.
+    """
+    conf_settings = settings
+    settings = OrderedDict()
+    
+    def __str__(self):
+        return self.name
+    
+    def __repr__(self):
+        value = str(self.value)
+        value = ("'%s'" if isinstance(value, str) else '%s') % value
+        return '<%s: %s>' % (self.name, value)
+    
+    def __new__(cls, name, default, help_text="", choices=None, editable=True, multiple=False, call_init=False):
+        if call_init:
+            return super(Setting, cls).__new__(cls)
+        cls.settings[name] = cls(name, default, help_text=help_text, choices=choices,
+            editable=editable, multiple=multiple, call_init=True)
+        return cls.get_value(name, default)
+    
+    def __init__(self, *args, **kwargs):
+        self.name, self.default = args
+        for name, value in kwargs.items():
+            setattr(self, name, value)
+        self.value = self.get_value(self.name, self.default)
+        self.settings[name] = self
+    
+    @classmethod
+    def get_value(cls, name, default):
+        return getattr(cls.conf_settings, name, default)
 
-ORCHESTRA_SITE_NAME = getattr(settings, 'ORCHESTRA_SITE_NAME',
-    'orchestra'
+    
+    # TODO validation, defaults to same type
+
+
+ORCHESTRA_BASE_DOMAIN = Setting('ORCHESTRA_BASE_DOMAIN',
+    'orchestra.lan'
 )
 
 
-ORCHESTRA_SITE_VERBOSE_NAME = getattr(settings, 'ORCHESTRA_SITE_VERBOSE_NAME',
+ORCHESTRA_SITE_URL = Setting('ORCHESTRA_SITE_URL', 'http://orchestra.%s' % ORCHESTRA_BASE_DOMAIN,
+    help_text=_("Domain name used when it will not be possible to infere the domain from a request."
+                "For example in periodic tasks.")
+)
+
+
+ORCHESTRA_SITE_NAME = Setting('ORCHESTRA_SITE_NAME', 'orchestra')
+
+
+ORCHESTRA_SITE_VERBOSE_NAME = Setting('ORCHESTRA_SITE_VERBOSE_NAME',
     _("%s Hosting Management" % ORCHESTRA_SITE_NAME.capitalize())
 )
 
 
-ORCHESTRA_BASE_DOMAIN = getattr(settings, 'ORCHESTRA_BASE_DOMAIN',
-    'orchestra.lan'
-)
-
 # Service management commands
 
-ORCHESTRA_START_SERVICES = getattr(settings, 'ORCHESTRA_START_SERVICES', [
+ORCHESTRA_START_SERVICES = Setting('ORCHESTRA_START_SERVICES', (
     'postgresql',
     'celeryevcam',
     'celeryd',
     'celerybeat',
     ('uwsgi', 'nginx'),
-])
+))
 
 
-ORCHESTRA_RESTART_SERVICES = getattr(settings, 'ORCHESTRA_RESTART_SERVICES', [
+ORCHESTRA_RESTART_SERVICES = Setting('ORCHESTRA_RESTART_SERVICES', (
     'celeryd',
     'celerybeat',
     'uwsgi'
-])
+))
 
-ORCHESTRA_STOP_SERVICES = getattr(settings, 'ORCHESTRA_STOP_SERVICES', [
+ORCHESTRA_STOP_SERVICES = Setting('ORCHESTRA_STOP_SERVICES', (
     ('uwsgi', 'nginx'),
     'celerybeat',
     'celeryd',
     'celeryevcam',
     'postgresql'
-])
+))
 
 
-ORCHESTRA_API_ROOT_VIEW = getattr(settings, 'ORCHESTRA_API_ROOT_VIEW',
+ORCHESTRA_API_ROOT_VIEW = Setting('ORCHESTRA_API_ROOT_VIEW',
     'orchestra.api.root.APIRoot'
 )
 
 
-ORCHESTRA_DEFAULT_SUPPORT_FROM_EMAIL = getattr(settings, 'ORCHESTRA_DEFAULT_SUPPORT_FROM_EMAIL',
+ORCHESTRA_DEFAULT_SUPPORT_FROM_EMAIL = Setting('ORCHESTRA_DEFAULT_SUPPORT_FROM_EMAIL',
     'support@{}'.format(ORCHESTRA_BASE_DOMAIN)
 )
+
+
+ORCHESTRA_EDIT_SETTINGS = Setting('ORCHESTRA_EDIT_SETTINGS', True)
diff --git a/orchestra/static/orchestra/icons/Preferences.png b/orchestra/static/orchestra/icons/Preferences.png
new file mode 100644
index 00000000..c81b6ba6
Binary files /dev/null and b/orchestra/static/orchestra/icons/Preferences.png differ
diff --git a/orchestra/static/orchestra/icons/Preferences.svg b/orchestra/static/orchestra/icons/Preferences.svg
new file mode 100644
index 00000000..c3df8ea2
--- /dev/null
+++ b/orchestra/static/orchestra/icons/Preferences.svg
@@ -0,0 +1,783 @@
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diff --git a/orchestra/static/orchestra/icons/preferences.png b/orchestra/static/orchestra/icons/preferences.png
new file mode 100644
index 00000000..e323a556
Binary files /dev/null and b/orchestra/static/orchestra/icons/preferences.png differ
diff --git a/orchestra/templatetags/utils.py b/orchestra/templatetags/utils.py
index 7e1ff468..63f261cc 100644
--- a/orchestra/templatetags/utils.py
+++ b/orchestra/templatetags/utils.py
@@ -81,6 +81,12 @@ def content_type_id(label):
     return ContentType.objects.filter(app_label=app_label, model=model).values_list('id', flat=True)[0]
 
 
+@register.filter
+def split(value, sep=' '):
+    parts = value.split(sep)
+    return (parts[0], sep.join(parts[1:]))
+
+
 @register.filter
 def admin_url(obj):
     return change_url(obj)
diff --git a/orchestra/utils/sys.py b/orchestra/utils/sys.py
index f452f970..f461bca0 100644
--- a/orchestra/utils/sys.py
+++ b/orchestra/utils/sys.py
@@ -76,9 +76,9 @@ def runiterator(command, display=False, error_codes=[0], silent=False, stdin=b''
         #.decode('ascii'), errors='replace')
         
         if display and stdout:
-            sys.stdout.write(stdout)
+            sys.stdout.write(stdout.decode('utf8'))
         if display and stderr:
-            sys.stderr.write(stderr)
+            sys.stderr.write(stderr.decode('utf8'))
         
         state = _Attribute(stdout)
         state.stderr = stderr