Pleroma - Pleroma is a free, federated social networking server built on open protocols.
Twoo - With the millions of active and interesting people around the world, Twoo is one of the most interesting and practical means for finding the new people across the globe.
GNU social - GNU social is communication software for both public and private communications.
FriendLife - FriendLife is a great and interesting way of making new and dashing friends for free.
ZeroMe - Social network for the distributed P2P network ZeroNet.
Anomo - Anomo is a simple to use social networking application that is breaking the ice by offering several means of communication to its users.