diff --git a/microcms/admin.py b/microcms/admin.py
index cbcdb88..73a4f8f 100644
--- a/microcms/admin.py
+++ b/microcms/admin.py
@@ -1,4 +1,11 @@
 # -*- coding: utf-8 -*-
+"""microcms.admin module, admin site configuration and options.
+
+THIS SOFTWARE IS UNDER BSD LICENSE.
+Copyright (c) 2010 Daniele Tricoli <eriol@mornie.org>
+
+Read LICENSE for more informations.
+"""
 from django import forms
 from django.conf import settings
 from django.contrib import admin
diff --git a/microcms/models.py b/microcms/models.py
index cf7bd46..3688d87 100644
--- a/microcms/models.py
+++ b/microcms/models.py
@@ -1,8 +1,14 @@
 # -*- coding: utf-8 -*-
+"""microcms.models module, Page the core model of microcms.
+
+THIS SOFTWARE IS UNDER BSD LICENSE.
+Copyright (c) 2010 Daniele Tricoli <eriol@mornie.org>
+
+Read LICENSE for more informations.
+"""
 import datetime
 
 from django.db import models
-from django.conf import settings
 from django.contrib.auth.models import User
 from django.contrib.flatpages.models import FlatPage
 from django.utils.translation import ugettext_lazy as _
diff --git a/microcms/settings.py b/microcms/settings.py
index f0dcdb2..23304c6 100644
--- a/microcms/settings.py
+++ b/microcms/settings.py
@@ -1,4 +1,11 @@
 # -*- coding: utf-8 -*-
+"""microcms.settings module, custom settings for microcms.
+
+THIS SOFTWARE IS UNDER BSD LICENSE.
+Copyright (c) 2010 Daniele Tricoli <eriol@mornie.org>
+
+Read LICENSE for more informations.
+"""
 from django.conf import settings
 
 CKEDITOR_URL = getattr(settings, 'CKEDITOR_URL', 'ckeditor/ckeditor.js')
diff --git a/microcms/templatetags/microcms_tags.py b/microcms/templatetags/microcms_tags.py
index a7952ed..58907cd 100644
--- a/microcms/templatetags/microcms_tags.py
+++ b/microcms/templatetags/microcms_tags.py
@@ -1,4 +1,12 @@
 # -*- coding: utf-8 -*-
+"""microcms.templatetags.microcms_tags module, some useful template tags for
+microcms.
+
+THIS SOFTWARE IS UNDER BSD LICENSE.
+Copyright (c) 2010 Daniele Tricoli <eriol@mornie.org>
+
+Read LICENSE for more informations.
+"""
 from django import template
 from django.template.defaultfilters import stringfilter
 
@@ -7,7 +15,10 @@ register = template.Library()
 @register.filter
 @stringfilter
 def active_page(url, regex):
-    """Check the current url with regex and return 'active' if matched."""
+    """Check the current url with regex and return 'active' if matched.
+
+    Avoid using this filter: better is to make use of CSS inheritance.
+    """
     import re
     if re.search(regex, url):
         return 'active'