diff --git a/src/Model/AppData.php b/src/Model/AppData.php
index 46a23f352c93afeb2ca870d9a14aab81cbf91ce3..97c523b181c68e0cf3323a0438cbe3aae218fdf7 100644
--- a/src/Model/AppData.php
+++ b/src/Model/AppData.php
@@ -481,7 +481,9 @@ class AppData
      */
     public function getForum(): string
     {
-        if (isset($this->raw['X-KDE-Forum'])) {
+        if (isset($this->raw['Custom']) && isset($this->raw['Custom']['KDE::forum'])) {
+            return $this->raw['Custom']['KDE::forum'];
+        } else if (isset($this->raw['X-KDE-Forum'])) {
             return 'https://forum.kde.org/viewforum.php?f='.$this->raw['X-KDE-Forum'];
         } else {
             return 'https://forum.kde.org/';
@@ -489,12 +491,14 @@ class AppData
     }
 
     /**
-     * Get AppData extension X-KDE-IRC
+     * Get Application irc channel
      * @return string[]
      */
     public function getIrcChannels(): array
     {
-        if (isset($this->raw['X-KDE-IRC'])) {
+        if (isset($this->raw['Custom']) && isset($this->raw['Custom']['KDE::irc'])) {
+            return $this->raw['Custom']['KDE::irc'];
+        } else if (isset($this->raw['X-KDE-IRC'])) {
             $irc = $this->raw['X-KDE-IRC'];
             if (is_array($irc)) {
                 return $irc;
@@ -506,6 +510,18 @@ class AppData
         }
     }
 
+    /**
+     * Get Application matrix channel
+     * @return string[]
+     */
+    public function getMatrixChannel(): ?string
+    {
+        if (isset($this->raw['Custom']) && isset($this->raw['Custom']['KDE::matrix'])) {
+            return $this->raw['Custom']['KDE::matrix'];
+        }
+        return null;
+    }
+
     private function unifyMailingList(string $mailingList): string
     {
         if (endsWith($mailingList, '@kde.org')) {
@@ -524,11 +540,14 @@ class AppData
     }
 
     /**
-     * AppData extension X-KDE-MailingLists
+     * AppData extension X-KDE-MailingLists or KDE::mailinglist
      * @return string[]
      */
     public function getMailingLists(): array
     {
+        if (isset($this->raw['Custom']) && isset($this->raw['Custom']['KDE::mailinglist'])) {
+            return unifyMailingList($this->raw['Custom']['KDE::mailinglist']);
+        }
         $ml = [];
         if (isset($this->raw['X-KDE-MailingLists'])) {
             $ml = $this->raw['X-KDE-MailingLists'];
@@ -542,6 +561,18 @@ class AppData
         return array_map('App\Model\AppData::unifyMailingList', $ml);
     }
 
+    /**
+     * AppData extension KDE::mailinglist-devel
+     * @return string[]
+     */
+    public function getDevelMailingList(): ?string
+    {
+        if (isset($this->raw['Custom']) && isset($this->raw['Custom']['KDE::mailinglist-devel'])) {
+            return unifyMailingList($this->raw['Custom']['KDE::mailinglist-devel']);
+        }
+        return null;
+    }
+
     /**
      * AppData extension X-KDE-Repository
      * @return string|null
diff --git a/templates/main/application.html.twig b/templates/main/application.html.twig
index a47d5b3af9afc432d62758d65ad4adf960834d97..60339822993987ac069830ed81d7c00f06784a63 100644
--- a/templates/main/application.html.twig
+++ b/templates/main/application.html.twig
@@ -265,7 +265,13 @@ AppStream application stores. You can also use your distribution's package manag
                 {% trans %}Report a bug{% endtrans %}
               </a>
             </div>
-          {% else %}
+          {% endif %}
+          {% if application.matrixChannel is not null %}
+            {% trans %}Matrix:{% endtrans %}
+            <a href="https://webchat.kde.org/#/room/{{ application.matrixChannel }}">
+              {{ application.matrixChannel }}
+            </a>
+            <br/>
           {% endif %}
           {% if application.ircChannels | length > 0 %}
             {% trans %}IRC:{% endtrans %}
@@ -283,6 +289,13 @@ AppStream application stores. You can also use your distribution's package manag
               </a>
             {% endfor %}
           {% endif %}
+          {% if application.develMailingList is not null %}
+            {% trans %}Developer mailing list:{% endtrans %}
+            <a href="https://mail.kde.org/mailman/listinfo/{{ application.develMailingList }}">
+              {{ application.develMailingList }}@kde.org
+            </a>
+            <br/>
+          {% endif %}
           {% if application.authors is not null %}
             <div>
               <b>{% trans %}Author(s):{% endtrans %}</b>