about: List loaded libraries

application/controllers/AboutController.php

@@ -12,6 +12,7 @@ class AboutController extends Controller
     public function indexAction()
     {
         $this->view->version = Version::get();
+        $this->view->libraries = Icinga::app()->getLibraries();
         $this->view->modules = Icinga::app()->getModuleManager()->getLoadedModules();
         $this->view->title = $this->translate('About');
         $this->view->tabs = $this->getTabs()->add(

application/views/scripts/about/index.phtml

@@ -94,7 +94,27 @@
             )
         ) ?>
     </div>
-    <h2><?= $this->translate('Loaded modules') ?></h2>
+    <h2><?= $this->translate('Loaded Libraries') ?></h2>
+    <table class="table-row-selectable common-table" data-base-target="_next">
+        <thead>
+            <tr>
+                <th><?= $this->translate('Name') ?></th>
+                <th><?= $this->translate('Version') ?></th>
+            </tr>
+        </thead>
+        <tbody>
+        <?php foreach ($libraries as $library): ?>
+            <tr>
+                <td>
+                    <?= $this->escape($library->getName()) ?>
+                <td>
+                    <?= $this->escape($library->getVersion()) ?: '-' ?>
+                </td>
+            </tr>
+        <?php endforeach ?>
+        </tbody>
+    </table>
+    <h2><?= $this->translate('Loaded Modules') ?></h2>
     <table class="table-row-selectable common-table" data-base-target="_next">
     <thead>
         <tr>

public/css/icinga/about.less

@@ -1,6 +1,10 @@
 /*! Icinga Web 2 | (c) 2015 Icinga Development Team | GPLv2+ */
 
 #about {
+  h2 {
+    margin-top: 2.5em;
+  }
+
   .about-social i {
     font-size: 1.7em;
     color: @text-color;