reorganization of communication system section

hopefully people will alphabetize the items they add to the list. This is my attempt to work on the communication systems section with the addition of freeswitch and mumble.

subversion was also mentioned.

README.md

@@ -96,24 +96,26 @@ Table of Contents
 
 ## Calendar and Address Books
 
-  * [Radicale](http://radicale.org/) - A Simple Calendar and Contact Server
-  * [calypso](http://keithp.com/calypso/) - a python-based CalDAV/CardDAV server
-  * [AgenDAV](http://agendav.org/) - Multilanguage CalDAV web client with a rich AJAX interface and shared calendars support
-  * [Baïkal](http://baikal.codr.fr/) - Lightweight CalDAV+CardDAV server
+    * [AgenDAV](http://agendav.org/) - Multilanguage CalDAV web client with a rich AJAX interface and shared calendars support
+    * [Baïkal](http://baikal.codr.fr/) - Lightweight CalDAV+CardDAV server
+    * [calypso](http://keithp.com/calypso/) - a python-based CalDAV/CardDAV server
+    * [Radicale](http://radicale.org/) - A Simple Calendar and Contact Server
 
 ## Communication Systems
 
   * [Cypht](http://cypht.org/index.html) - A feed reader for your email accounts - `GPL`
+  * [FreeSWITCH](https://freeswitch.org/) - Scalable open source cross-platform telephony platform `MPL` `C`
   * [HipChat](https://www.atlassian.com/software/hipchat) `⊘ Proprietary` - A team chat solution with 1:1 chat audio and video, third party integration and more `PHP + Python`
+  * [Kaiwa](http://getkaiwa.com) A modern XMPP Web client ([Source code](https://github.com/digicoop/kaiwa))
+  * [Kandan](http://getkandan.com/) – Kandan is an Open Source Alternative to HipChat. - `AGPL`
+   * [Kontalk](http://kontalk.org/) – Kontalk is an Open Source Messenger, similiar to WhatsApp (app for android only currently), including end-to-end encryption, server is based on Tigase XMPP Server - [Source code](https://github.com/kontalk)) - `GPLv3`
   * [Metronome](http://www.lightwitch.org/metronome) – XMPP server forked from Prosody. `MIT`
+  * [Mumble](http://wiki.mumble.info/wiki/Main_Page) - Mumble is an open source, cross platform, low-latency, high quality voice chat software primarily intended for use while gaming. `BSD` `C++`
   * [Node-Chat](https://github.com/IgorAntun/node-chat) - A not-so-basic open-source chat with admin features. - `MIT`
-  * [Prosody](http://prosody.im/) – Modern XMPP server written in Lua. `MIT`
-  * [Kandan](http://getkandan.com/) – Kandan is an Open Source Alternative to HipChat. - `AGPL`
-  * [Kontalk](http://kontalk.org/) – Kontalk is an Open Source Messenger, similiar to WhatsApp (app for android only currently), including end-to-end encryption, server is based on Tigase XMPP Server - [Source code](https://github.com/kontalk)) - `GPLv3`
   * [OpenFire](http://www.igniterealtime.org/projects/openfire/) - instant messaging (XMPP) and groupchat server written in Java - `Apache 2.0`
+  * [Prosody](http://prosody.im/) – Modern XMPP server written in Lua. `MIT`
   * [Rocket.Chat](http://rocket.chat/) – Teamchat solution similar to Gitter.im or Slack - `MIT`
   * [Roundcube](https://roundcube.net) - A web interface to act as an IMAP frontend ([Screenshots](https://roundcube.net/screens/)) ([Source code](https://github.com/roundcube/roundcubemail/)) `GPLv3` `PHP`
-  * [Kaiwa](http://getkaiwa.com) A modern XMPP Web client ([Source code](https://github.com/digicoop/kaiwa))
   * [Shout](http://shout-irc.com/) -The self-hosted web IRC client ([Demo](http://demo.shout-irc.com/), [Source code](https://github.com/erming/shout)) `MIT` `Nodejs`
 
 ## Content Management Systems (CMS)