GNU social - GNU social is communication software for both public and private communications.
Identi.ca - Social & Communications
Gab - Gab is an ad-free social network dedicated to free speech.
ColdCast - An open social network with zero corporate interference.
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...