Cleanup and combine XMPP client list. Change app recomendations based…

… on those supporting OMEMO.

_includes/sections/instant-messenger.html

@@ -60,12 +60,16 @@ <h3>Worth Mentioning</h3>
 
 <ul>
   <li><a href="https://retroshare.cc/">RetroShare</a> - An E2E encrypted instant messaging and voice/video call client. RetroShare supports both TOR and I2P. </li>
-  <li><a href="https://www.chatsecure.org">ChatSecure</a> - ChatSecure is a free and open source messaging app that features OTR encryption over XMPP. </li>
+  <li>XMPP federated clients with OMEMO support:</li>
+  <ul>
+    <li><a href="https://monal.im/">Monal</a> (iOS, MacOS) - An XMPP client in active development.</li>
+    <li><a href="https://conversations.im/">Conversations</a> (Android) - An open source Jabber/XMPP client for Android 4.4+ smartphones. Supports end-to-end encryption with either OMEMO or OpenPGP.</li>
+    <li><a href="https://gajim.org/">Gajim</a> (Linux) - An open source fully featured XMPP client.</li>
+    <li><a href="https://omemo.top">List of OMEMO ready clients</a></li>
+  </ul>
   <li><a href="https://kontalk.org/">Kontalk</a> - A community-driven instant messaging network. Supports end-to-end encryption. Both client-to-server and server-to-server channels are fully encrypted.</li>
-  <li><a href="https://play.google.com/store/apps/details?id=eu.siacs.conversations">Conversations</a> - An open source Jabber/XMPP client for Android 4.4+ smartphones. Supports end-to-end encryption with either OMEMO or openPGP. There is also <a href="https://play.google.com/store/apps/details?id=eu.siacs.conversations.legacy">Conversations Legacy</a> which still supports OTR.</li>
   <li><a href="https://get.wire.com/">Wire</a> <span class="badge badge-warning" data-toggle="tooltip" title="Wire stores metadata such as list of your connections/conversations in plaintext (= not encrypted).">experimental <i class="far fa-question-circle"></i> (<a href="https://www.vice.com/en_us/article/gvzw5x/secure-messaging-app-wire-stores-everyone-youve-ever-contacted-in-plain-text">more info</a>)</span> - A free software End-to-End Encrypted chatting application that supports instant messaging, voice, and video calls.</li>
-  <li><a href="https://status.im/">Status</a> - <span class="badge badge-warning">Experimental</span> A free and open-source, peer-to-peer, encrypted instant messanger with support for DAPPs. </li>    
-  <li><a href="https://en.wikipedia.org/wiki/Off-the-Record_Messaging#Client_support">List of OTR Clients - Wikipedia</a></li>
+  <li><a href="https://status.im/">Status</a> - <span class="badge badge-warning">Experimental</span> A free and open-source, peer-to-peer, encrypted instant messanger with support for DAPPs. </li>
 </ul>