I recently ported IPFS (http://ipfs.io) to iOS and have been running it on my iPhone for the last few months .. I was very pleasantly surprised how little fuss was required to get Go compiling for the iOS platform, and reminded once again that underneath all the garden trimmings, iOS is really just a little Unix workstation.

(BTW, IPFS on iOS: not ready for primetime, but .. what a world it will be when it is!)