Pidgin
Open Source
Pidgin is a free and open-source chat client which supports AIM, Google Talk, ICQ, XMPP protocols.
Jitsi
Open Source
Jitsi (formerly SIP Communicator) is a free and open source multiplatform voice (VoIP), videoconferencing and instant messaging application.
Psi
Open Source
Psi is a free instant messaging application designed for the XMPP network (including Google Talk). Fast and lightweight, Psi is fully open-source and compatib…
qutIM
Open Source
qutIM is free and open-source multiprotocol (ICQ, Jabber, Mail.Ru, IRC, VKontakte) instant messenger.
Tkabber
Open Source
Tkabber is a GPL instant messaging client for the XMPP protocol which uses the Tk toolkit for the GUI.
Trillian
Freemium
Trillian is a proprietary multiprotocol instant messaging application.
Miranda IM
Open Source
Miranda IM is an open source multiprotocol instant messaging application, designed for Microsoft Windows.
Gajim
Open Source
Gajim is an instant messaging client for the XMPP protocol which uses the GTK+ toolkit.
KakaoTalk
Freemium
KakaoTalk (Korean: 카카오톡), or sometimes KaTalk, is a free mobile instant messaging application for smartphones with free text and free call features.
YakYak
Open Source
YakYak is a desktop chat client for Google Hangouts.
