diff --git a/app/views/layouts/application-ng.html.erb b/app/views/layouts/application-ng.html.erb
index 44666c0..2bad06a 100644
--- a/app/views/layouts/application-ng.html.erb
+++ b/app/views/layouts/application-ng.html.erb
@@ -83,5 +83,10 @@
     <%= noosfero_layout_features %>
     <%= theme_javascript_ng %>
     <%= addthis_javascript %>
+    <%=
+      @plugins.dispatch(:body_ending).map do |content|
+        if content.respond_to?(:call) then instance_exec(&content).html_safe else content.html_safe end
+      end.join("\n")
+    %>
   </body>
 </html>
diff --git a/lib/noosfero/plugin.rb b/lib/noosfero/plugin.rb
index a3608de..20be127 100644
--- a/lib/noosfero/plugin.rb
+++ b/lib/noosfero/plugin.rb
@@ -277,6 +277,12 @@ class Noosfero::Plugin
     nil
   end
 
+  # -> Adds content to the ending of the page
+  # returns = lambda block that creates html code or raw rhtml/html.erb
+  def body_ending
+    nil
+  end
+
   # -> Adds content to the ending of the page head
   # returns = lambda block that creates html code or raw rhtml/html.erb
   def head_ending
diff --git a/plugins/piwik/controllers/piwik_plugin_admin_controller.rb b/plugins/piwik/controllers/piwik_plugin_admin_controller.rb
new file mode 100644
index 0000000..b7d5d38
--- /dev/null
+++ b/plugins/piwik/controllers/piwik_plugin_admin_controller.rb
@@ -0,0 +1,16 @@
+class PiwikPluginAdminController < AdminController
+
+  append_view_path File.join(File.dirname(__FILE__) + '/../views')
+
+  def index
+    if request.post?
+      if @environment.update_attributes(params[:environment])
+        session[:notice] = _('Piwik plugin settings updated successfully.')
+      else
+        session[:notice] = _('Piwik plugin settings could not be saved.')
+      end
+      redirect_to :controller => 'plugins', :action => 'index'
+    end
+  end
+
+end
diff --git a/plugins/piwik/lib/ext/environment.rb b/plugins/piwik/lib/ext/environment.rb
new file mode 100644
index 0000000..33157e1
--- /dev/null
+++ b/plugins/piwik/lib/ext/environment.rb
@@ -0,0 +1,7 @@
+require_dependency 'environment'
+
+class Environment
+  settings_items :piwik_domain
+  settings_items :piwik_site_id
+  attr_accessible :piwik_domain, :piwik_site_id
+end
diff --git a/plugins/piwik/lib/piwik_plugin.rb b/plugins/piwik/lib/piwik_plugin.rb
new file mode 100644
index 0000000..a7c3500
--- /dev/null
+++ b/plugins/piwik/lib/piwik_plugin.rb
@@ -0,0 +1,24 @@
+class PiwikPlugin < Noosfero::Plugin
+
+  include ActionView::Helpers::JavaScriptHelper
+  include ActionView::Helpers::FormHelper
+  include ActionView::Helpers::UrlHelper
+  include ActionView::Helpers::TagHelper
+
+  def self.plugin_name
+    "Piwik"
+  end
+
+  def self.plugin_description
+    _("Tracking and web analytics to your Noosfero's environment")
+  end
+
+  def body_ending
+    domain = context.environment.piwik_domain
+    site_id = context.environment.piwik_site_id
+    unless domain.blank? || site_id.blank?
+      expanded_template('tracking-code.rhtml',{:domain => domain, :site_id => site_id})
+    end
+  end
+
+end
diff --git a/plugins/piwik/test/functional/piwik_plugin_test.rb b/plugins/piwik/test/functional/piwik_plugin_test.rb
new file mode 100644
index 0000000..0267f95
--- /dev/null
+++ b/plugins/piwik/test/functional/piwik_plugin_test.rb
@@ -0,0 +1,31 @@
+require File.dirname(__FILE__) + '/../../../../test/test_helper'
+require File.dirname(__FILE__) + '/../../controllers/piwik_plugin_admin_controller'
+
+# Re-raise errors caught by the controller.
+class PiwikPluginAdminController; def rescue_action(e) raise e end; end
+
+class PiwikPluginAdminControllerTest < ActionController::TestCase
+
+  def setup
+    @environment = Environment.default
+    user_login = create_admin_user(@environment)
+    login_as(user_login)
+    @environment.enabled_plugins = ['PiwikPlugin']
+    @environment.save!
+  end
+
+  should 'access index action' do
+    get :index
+    assert_template 'index'
+    assert_response :success
+  end
+
+  should 'update piwik plugin settings' do
+    assert_nil @environment.reload.piwik_domain
+    assert_nil @environment.reload.piwik_site_id
+    post :index, :environment => { :piwik_domain => 'http://something', :piwik_site_id => 10 }
+    assert_not_nil @environment.reload.piwik_domain
+    assert_not_nil @environment.reload.piwik_site_id
+  end
+
+end
diff --git a/plugins/piwik/test/unit/piwik_plugin_test.rb b/plugins/piwik/test/unit/piwik_plugin_test.rb
new file mode 100644
index 0000000..f3eca89
--- /dev/null
+++ b/plugins/piwik/test/unit/piwik_plugin_test.rb
@@ -0,0 +1,42 @@
+require File.dirname(__FILE__) + '/../../../../test/test_helper'
+
+class PiwikPluginTest < ActiveSupport::TestCase
+
+  def setup
+    @plugin = PiwikPlugin.new
+    @context = mock()
+    @plugin.context = @context
+    @environment = Environment.new
+    @context.stubs(:environment).returns(@environment)
+  end
+
+  should 'add content at the body ending unless domain and site_id are blank' do
+    @environment.piwik_domain = 'piwik.domain.example.com'
+    @environment.piwik_site_id = 5
+    @plugin.stubs(:expanded_template).returns('content')
+    assert_equal 'content', @plugin.body_ending
+  end
+
+  should 'not add any content at the body ending if domain is blank' do
+    @environment.piwik_domain = nil
+    @environment.piwik_site_id = 5
+    @plugin.stubs(:expanded_template).returns('content')
+    assert_equal nil, @plugin.body_ending
+  end
+
+  should 'not add any content at the body ending if site_id is blank' do
+    @environment.piwik_domain = 'piwik.domain.example.com'
+    @environment.piwik_site_id = nil
+    @plugin.stubs(:expanded_template).returns('content')
+    assert_equal nil, @plugin.body_ending
+  end
+
+  should 'extends Environment with attr piwik_domain' do
+    assert_respond_to Environment.new, :piwik_domain
+  end
+
+  should 'extends Environment with attr piwik_site_id' do
+    assert_respond_to Environment.new, :piwik_site_id
+  end
+
+end
diff --git a/plugins/piwik/views/piwik_plugin_admin/index.html.erb b/plugins/piwik/views/piwik_plugin_admin/index.html.erb
new file mode 100644
index 0000000..edd31f2
--- /dev/null
+++ b/plugins/piwik/views/piwik_plugin_admin/index.html.erb
@@ -0,0 +1,13 @@
+<h1><%= _("Piwik plugin settings") %></h1>
+
+<%= form_for(:environment) do |f| %>
+
+  <%= labelled_form_field _('Piwik domain'), f.text_field(:piwik_domain) %>
+
+  <%= labelled_form_field _('Piwik site id'), f.text_field(:piwik_site_id) %>
+
+  <% button_bar do %>
+    <%= submit_button(:save, _('Save'), :cancel => {:controller => 'plugins', :action => 'index'}) %>
+  <% end %>
+
+<% end %>
diff --git a/plugins/piwik/views/tracking-code.rhtml b/plugins/piwik/views/tracking-code.rhtml
new file mode 100644
index 0000000..0ff2fcb
--- /dev/null
+++ b/plugins/piwik/views/tracking-code.rhtml
@@ -0,0 +1,15 @@
+<!-- Piwik -->
+<script type="text/javascript">
+  var _paq = _paq || [];
+  _paq.push(['trackPageView']);
+  _paq.push(['enableLinkTracking']);
+  (function() {
+    var u=(("https:" == document.location.protocol) ? "https" : "http") + "://<%= escape_javascript locals[:domain] %>/piwik/";
+    _paq.push(['setTrackerUrl', u+'piwik.php']);
+    _paq.push(['setSiteId', <%= escape_javascript locals[:site_id] %>]);
+    var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0]; g.type='text/javascript';
+    g.defer=true; g.async=true; g.src=u+'piwik.js'; s.parentNode.insertBefore(g,s);
+  })();
+</script>
+<noscript><p><img src="http://<%= escape_javascript locals[:domain] %>/piwik/piwik.php?idsite=<%= escape_javascript locals[:site_id] %>" style="border:0;" alt="" /></p></noscript>
+<!-- End Piwik Code -->
--
libgit2 0.21.2