If you are interested in building p2p applications on top of block chains checkout http://github.com/geo-gs/sawwit http://github.com/geo-gs/sawwit *Disclaimer:

If you are interested in building p2p applications on top of block chains checkout http://github.com/geo-gs/sawwit http://github.com/geo-gs/sawwit *Disclaimer: Sawwit is one of my hobby projects