[rexreed]

XMPP on a Raspberry Pi box with minimal raspbian and OTR. Gives you some control and a minimally-hackable box.

Some interesting related reading on the XMPP with Raspberry Pi:

[1] http://russelldavis.org/2013/01/18/setting-up-prosody-on-the...

[2] http://oskarhane.com/make-your-raspberry-pis-and-other-serve...