* [Crypptocat](https://crypto.cat/): não recomendado por conta de uma arquitetura problemática.
* [Mumble](http://mumble.sourceforge.net).
* Asterisk/SIP: puppet-asterisk: [1](https://github.com/camptocamp/puppet-asterisk) e [2](https://github.com/AhmedElGamil/puppet-asterisk).
+ * [RTC quick start](http://www.rtcquickstart.org/).
* Jabber
* [ejabberd](http://packages.debian.org/stable/ejabberd) ([puppet-ejabberd](https://git.sarava.org/?p=puppet-ejabberd.git)).
* [prosody](http://packages.debian.org/stable/prosody).