nylira/prism-break — pull request #283 by repat (2013-07-12 10:03:51+00:00)
Title: threema

have a look at http://threema.ch/en/. It's not open-source (yet) but neither is duckduckgo or riseup. there is a podcast with the lead developer at http://monoxyd.de/20130118-die-wahrheit-017-threema-smartphone-messenger-mit-verschlusselung