Friendica - Decentralisation - Privacy - Interoperability
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...
Mastodon - Mastodon is a decentralized, open source social network. This is just one part of the network, run by the main developers of the project It is not focused on any particular niche interest - everyone is welcome!
Gab - Gab is an ad-free social network dedicated to free speech.