diff --git a/src/mibew/libs/classes/Mibew/Asset/AssetManager.php b/src/mibew/libs/classes/Mibew/Asset/AssetManager.php
index 1de8c23b..3643e4b0 100644
--- a/src/mibew/libs/classes/Mibew/Asset/AssetManager.php
+++ b/src/mibew/libs/classes/Mibew/Asset/AssetManager.php
@@ -203,8 +203,17 @@ class AssetManager implements AssetManagerInterface
     }
 
     /**
-     * Triggers "pageAddCSS" event and prepares CSS assets which are returned by
-     * plugins.
+     * Gets additional CSS assets by triggering some events.
+     *
+     * Triggers "pageAddCSS" and passes to the listeners an associative array
+     * with the following keys:
+     *  - "request": {@link \Symfony\Component\HttpFoundation\Request}, a
+     *    request instance. CSS files will be attached to the requested page.
+     *  - "css": array of assets. Each asset can be either a string with
+     *    absolute URL of a CSS file or an array with "content" and "type"
+     *    items. See {@link \Mibew\Asset\AssetManagerInterface::getCssAssets()}
+     *    for details of their meaning. Modify this array to add or remove
+     *    additional CSS files.
      *
      * @return array Assets list.
      */
diff --git a/src/mibew/libs/classes/Mibew/Controller/AbstractController.php b/src/mibew/libs/classes/Mibew/Controller/AbstractController.php
index e20c9635..8f51314a 100644
--- a/src/mibew/libs/classes/Mibew/Controller/AbstractController.php
+++ b/src/mibew/libs/classes/Mibew/Controller/AbstractController.php
@@ -26,6 +26,7 @@ use Mibew\Authentication\AuthenticationManagerAwareInterface;
 use Mibew\Authentication\AuthenticationManagerInterface;
 use Mibew\Cache\CacheAwareInterface;
 use Mibew\Handlebars\HandlebarsAwareInterface;
+use Mibew\Handlebars\Helper\AdditionalCssHelper;
 use Mibew\Handlebars\Helper\AdditionalJsHelper;
 use Mibew\Handlebars\Helper\AssetHelper;
 use Mibew\Handlebars\Helper\CsrfProtectedRouteHelper;
@@ -131,6 +132,9 @@ abstract class AbstractController implements
             if ($handlebars->hasHelper('additionalJs')) {
                 $handlebars->getHelper('additionalJs')->setAssetManager($manager);
             }
+            if ($handlebars->hasHelper('additionalCss')) {
+                $handlebars->getHelper('additionalCss')->setAssetManager($manager);
+            }
         }
     }
 
@@ -291,6 +295,10 @@ abstract class AbstractController implements
                 'additionalJs',
                 new AdditionalJsHelper($this->getAssetManager())
             );
+            $style->getHandlebars()->addHelper(
+                'additionalCss',
+                new AdditionalCssHelper($this->getAssetManager())
+            );
         }
 
         return $style;
diff --git a/src/mibew/libs/classes/Mibew/Controller/Chat/OperatorChatController.php b/src/mibew/libs/classes/Mibew/Controller/Chat/OperatorChatController.php
index a2712731..b3ba47b0 100644
--- a/src/mibew/libs/classes/Mibew/Controller/Chat/OperatorChatController.php
+++ b/src/mibew/libs/classes/Mibew/Controller/Chat/OperatorChatController.php
@@ -60,14 +60,11 @@ class OperatorChatController extends AbstractController
             return $this->showErrors(array('Cannot view threads'));
         }
 
-        $page = array_merge_recursive(
-            setup_chatview_for_operator(
-                $this->getRouter(),
-                $request,
-                $thread,
-                $operator
-            ),
-            get_plugins_data($request)
+        $page = setup_chatview_for_operator(
+            $this->getRouter(),
+            $request,
+            $thread,
+            $operator
         );
 
         // Build js application options
diff --git a/src/mibew/libs/classes/Mibew/Controller/Chat/UserChatController.php b/src/mibew/libs/classes/Mibew/Controller/Chat/UserChatController.php
index 16232749..c713011c 100644
--- a/src/mibew/libs/classes/Mibew/Controller/Chat/UserChatController.php
+++ b/src/mibew/libs/classes/Mibew/Controller/Chat/UserChatController.php
@@ -47,13 +47,10 @@ class UserChatController extends AbstractController
             throw new NotFoundException('The thread is not found.');
         }
 
-        $page = array_merge_recursive(
-            setup_chatview_for_user(
-                $this->getRouter(),
-                $request,
-                $thread
-            ),
-            get_plugins_data($request)
+        $page = setup_chatview_for_user(
+            $this->getRouter(),
+            $request,
+            $thread
         );
 
         // Build js application options
@@ -148,7 +145,6 @@ class UserChatController extends AbstractController
                         $info,
                         $referrer
                     ),
-                    get_plugins_data($request),
                     array(
                         'mibewBasePath' => $request->getBasePath(),
                         'mibewBaseUrl' => $request->getBaseUrl(),
@@ -185,7 +181,6 @@ class UserChatController extends AbstractController
                         $info,
                         $referrer
                     ),
-                    get_plugins_data($request),
                     array(
                         'mibewBasePath' => $request->getBasePath(),
                         'mibewBaseUrl' => $request->getBaseUrl(),
@@ -250,10 +245,7 @@ class UserChatController extends AbstractController
         $thread = Thread::load($invitation_state['threadid']);
 
         // Prepare page
-        $page = array_merge_recursive(
-            setup_invitation_view($thread),
-            get_plugins_data($request)
-        );
+        $page = setup_invitation_view($thread);
 
         // Build js application options
         $page['invitationOptions'] = json_encode($page['invitation']);
diff --git a/src/mibew/libs/classes/Mibew/Controller/UsersController.php b/src/mibew/libs/classes/Mibew/Controller/UsersController.php
index 28b77468..e7e48b9b 100644
--- a/src/mibew/libs/classes/Mibew/Controller/UsersController.php
+++ b/src/mibew/libs/classes/Mibew/Controller/UsersController.php
@@ -80,8 +80,6 @@ class UsersController extends AbstractController
         $page['title'] = getlocal("List of visitors waiting");
         $page['menuid'] = "users";
 
-        // Get additional plugins data
-        $page = array_merge($page, get_plugins_data($request));
         $page = array_merge($page, prepare_menu($operator));
 
         return $this->render('users', $page);
diff --git a/src/mibew/libs/classes/Mibew/Handlebars/Helper/AdditionalCssHelper.php b/src/mibew/libs/classes/Mibew/Handlebars/Helper/AdditionalCssHelper.php
new file mode 100644
index 00000000..c6e63f90
--- /dev/null
+++ b/src/mibew/libs/classes/Mibew/Handlebars/Helper/AdditionalCssHelper.php
@@ -0,0 +1,131 @@
+<?php
+/*
+ * This file is a part of Mibew Messenger.
+ *
+ * Copyright 2005-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+namespace Mibew\Handlebars\Helper;
+
+use Handlebars\Context;
+use Handlebars\Helper as HelperInterface;
+use Handlebars\SafeString;
+use Handlebars\Template;
+use Mibew\Asset\AssetManagerAwareInterface;
+use Mibew\Asset\AssetManagerInterface;
+
+/**
+ * A helper that generates additional CSS list from assets attached to
+ * Asset Manager.
+ *
+ * Example of usage:
+ * <code>
+ *   {{additionalCss}}
+ * </code>
+ */
+class AdditionalCssHelper implements HelperInterface, AssetManagerAwareInterface
+{
+    /**
+     * @var AssetManagerInterface|null
+     */
+    protected $manager = null;
+
+    /**
+     * Class constructor.
+     *
+     * @param AssetUrlGeneratorInterface $manager An instance of Asset Manager.
+     */
+    public function __construct(AssetManagerInterface $manager)
+    {
+        $this->manager = $manager;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getAssetManager()
+    {
+        return $this->manager;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setAssetManager(AssetManagerInterface $manager)
+    {
+        $this->manager = $manager;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function execute(Template $template, Context $context, $args, $source)
+    {
+        $generator = $this->getAssetManager()->getUrlGenerator();
+        $buffer = array();
+
+        foreach ($this->getAssetManager()->getCssAssets() as $asset) {
+            switch ($asset['type']) {
+                case AssetManagerInterface::ABSOLUTE_URL:
+                    $buffer[] = $this->renderUrl($asset['content']);
+                    break;
+
+                case AssetManagerInterface::RELATIVE_URL:
+                    $buffer[] = $this->renderUrl($generator->generate($asset['content']));
+                    break;
+
+                case AssetManagerInterface::INLINE:
+                    $buffer[] = $this->renderContent($asset['content']);
+                    break;
+
+                default:
+                    throw new \RuntimeException(sprintf(
+                        'Unknown asset type "%s"',
+                        $asset['type']
+                    ));
+            }
+        }
+
+        return new SafeString(implode("\n", $buffer));
+    }
+
+    /**
+     * Renders URL of an asset.
+     *
+     * @param string $url URL of an asset.
+     * @return string HTML markup.
+     */
+    protected function renderUrl($url)
+    {
+        return sprintf(
+            '<link rel="stylesheet" type="text/css" href="%s" />',
+            safe_htmlspecialchars($url)
+        );
+    }
+
+    /**
+     * Renders content of an asset.
+     *
+     * @param string $content Content of an asset.
+     * @return string HTML markup.
+     */
+    protected function renderContent($content)
+    {
+        return sprintf(
+            '<style type="text/css">%s</style>',
+            $content
+        );
+    }
+}
diff --git a/src/mibew/libs/common/response.php b/src/mibew/libs/common/response.php
index e3530b76..e2a96dcd 100644
--- a/src/mibew/libs/common/response.php
+++ b/src/mibew/libs/common/response.php
@@ -17,9 +17,6 @@
  * limitations under the License.
  */
 
-use Mibew\EventDispatcher;
-use Symfony\Component\HttpFoundation\Request;
-
 function get_popup($href, $js_href, $message, $title, $wnd_name, $options)
 {
     if (!$js_href) {
@@ -33,55 +30,6 @@ function get_popup($href, $js_href, $message, $title, $wnd_name, $options)
         . "this.newWindow.focus();this.newWindow.opener=window;return false;\">$message</a>";
 }
 
-/**
- * Load additional CSS files, required by plugins, and build HTML code to
- * include them
- *
- * Triggers 'pageAddCSS' and pass listeners associative array with
- * following keys:
- *  - 'request': {@link \Symfony\Component\HttpFoundation\Request}, a request
- *    instance. CSS files will be attached to the requested page.
- *  - 'css': array, with CSS files paths. Modify this array to add or remove
- *    additional CSS files.
- *
- * @param Request $request A Request instance.
- * @return string HTML block of 'link' tags
- */
-function get_additional_css(Request $request)
-{
-    // Prepare event arguments array
-    $args = array(
-        'request' => $request,
-        'css' => array(),
-    );
-
-    // Trigger event
-    $dispatcher = EventDispatcher::getInstance();
-    $dispatcher->triggerEvent('pageAddCSS', $args);
-
-    // Build resulting css list
-    $result = array();
-    foreach ($args['css'] as $css) {
-        $result[] = '<link rel="stylesheet" type="text/css" href="' . $css . '">';
-    }
-
-    return implode("\n", $result);
-}
-
-/**
- * Get additional plugins data for specified page
- *
- * @param Request $request A Request instance.
- * @return array Associative array of plugins data. It contains following keys:
- *    - 'additional_css': contains results of the 'get_additional_css function
- */
-function get_plugins_data(Request $request)
-{
-    return array(
-        'additional_css' => get_additional_css($request),
-    );
-}
-
 function no_field($key)
 {
     return getlocal('Please fill "{0}".', array(getlocal($key)));
diff --git a/src/mibew/styles/dialogs/default/templates_src/server_side/chat.handlebars b/src/mibew/styles/dialogs/default/templates_src/server_side/chat.handlebars
index 97fd415d..fd7a7323 100644
--- a/src/mibew/styles/dialogs/default/templates_src/server_side/chat.handlebars
+++ b/src/mibew/styles/dialogs/default/templates_src/server_side/chat.handlebars
@@ -4,7 +4,7 @@
             <link rel="stylesheet" type="text/css" href="{{asset "@CurrentStyle/chat_ie7.css"}}" media="all" />
         <![endif]-->
 
-        {{{additional_css}}}
+        {{additionalCss}}
 
         <!-- External libs -->
         <script type="text/javascript" src="{{asset "js/libs/jquery.min.js"}}"></script>
diff --git a/src/mibew/styles/pages/default/templates_src/server_side/users.handlebars b/src/mibew/styles/pages/default/templates_src/server_side/users.handlebars
index 8988a911..cc668007 100644
--- a/src/mibew/styles/pages/default/templates_src/server_side/users.handlebars
+++ b/src/mibew/styles/pages/default/templates_src/server_side/users.handlebars
@@ -5,7 +5,7 @@
 
     {{#override "head"}}
         <!-- Plugins CSS files -->
-        {{{additional_css}}}
+        {{additionalCss}}
 
         <script type="text/javascript" src="{{asset "js/compiled/users_app.js"}}"></script>