Pleroma - Pleroma is a free, federated social networking server built on open protocols.
Mapple.me - Mapple.me bridges the gap between available time and availability of friends to increase social...
GNU social - GNU social is communication software for both public and private communications.
Glympse - Glympse is the easy way to safely share your location in realtime. No sign-up needed.
ZeroMe - Social network for the distributed P2P network ZeroNet.
Pathshare - Pathshare is a beautiful app that helps you share your path in realtime.