I'm currently contributing to Bitmessage < https://bitmessage.org >. It's a p2p messaging network (think email, not IM) with built-in ECC, and it aims to hide sender & receiver. The network layer is fairly solid; right now we're mostly doing UI work. What we could really use is someone to spot the (inevitable) bugs in the crypto layer, but other input is very welcome as well.
The code works out of the box (git clone && cd src && python bitmessagemain.py) on most linux distros. Thanks!
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