ColdCast - An open social network with zero corporate interference.
ZeroMe - Social network for the distributed P2P network ZeroNet.
GNU social - GNU social is communication software for both public and private communications.
Pleroma - Pleroma is a free, federated social networking server built on open protocols.
YouWeb - The first social network focused on your way to experience the Web and interact with virtual...
Fritter - A peer-to-peer social feed application (in progress!)