Pidgin
Open Source
Pidgin is a free and open-source chat client which supports AIM, Google Talk, ICQ, XMPP protocols.
Trillian
Freemium
Trillian is a proprietary multiprotocol 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…
Franz
Free
Franz is a free messaging app /former emperor of Austria, that combines chat & messaging services into one application.
Instantbird
Open Source
Instantbird is a cross-platform instant messaging client based on Mozillas XULRunner and the open source library libpurple used in Pidgin.
KakaoTalk
Freemium
KakaoTalk (Korean: 카카오톡), or sometimes KaTalk, is a free mobile instant messaging application for smartphones with free text and free call features.
Kadu
Open Source
Kadu is a free and open source multi-platform instant messaging client that supports Gadu-Gadu, XMPP IM networks and other services based on XMPP like Google …
YakYak
Open Source
YakYak is a desktop chat client for Google Hangouts.
Adium
Open Source
Adium is an Open source multi-protocol instant messaging client for Mac OS X, supports MSN, Jabber, Yahoo! and other networks.
Jitsi
Open Source
Jitsi (formerly SIP Communicator) is a free and open source multiplatform voice (VoIP), videoconferencing and instant messaging application.
Kopete
Open Source
Kopete is a multi-protocol, free software instant messaging client released as part of the KDE Software Compilation. Although it can run in numerous environme…
ICQ
Free
ICQ is an open source instant messaging software.
Spark
Open Source
Apache Spark is an open-source cluster-computing framework.
Tencent QQ
Free
Tencent QQ (QQ) is an instant messaging software service.
Coccinella
Open Source
Coccinella is a free and open-source cross-platform client for the XMPP/Jabber-instant messaging-protocol.
