domini-tathagata
Aardwolf, github.com
Diaspora, diasporafoundation.org
Elgg, elgg.org
Friendica (formerly Friendika, Mistpark), friendi.ca
GNU Social (formerly StatusNet), gnu.io
Hubzilla, project.hubzilla.org
HumHub (GNU AGPL), humhub.org
Mastodon, mastodon.social
Mov.im, movim.eu
OpenSource Social Network, opensource-socialnetwork.org Source Code
Pandora, github.com
Peergos, peergos.github.io
QBix, qbix.com
pump.io, pump.io (used now in Identi.ca)
secushare, secushare.org (social client for GNUNet)
Socialhome, github.com
Salut à Toi, salut-a-toi.org
Sola (formerly Plague, then Plag), sola.foundation
SSB (Secure ScuttleButt), scuttlebutt.nz
Twister, twister.net.co
ZeroMe, github.com (social client for ZeroNet)