Pidgin, Matrix.org, Adium, Xabber, Trillian, Bitmessage, Empathy, Olvid, Miranda NG, XMPP, Conversations, Messenger for Desktop, Digsby, Psi+, Instantbird, Kopete, shMessenger, climm, Jappix, CoyIM, Beagle IM, CenterICQ, Ayttm, naim, MetroIRC, Jabiru, Caya, Kaiwa, OneTeam, Psyced, Tkabber, Vacuum-IM, Pidgin on MacOSX, Kadu, MCabber are some alternatives to Gajim.