Pidgin is a free and open-source chat client which supports AIM, Google Talk, ICQ, XMPP protocols.

IM+ supports simultaneously major IM services, including Google Talk, Twitter DMs, Yahoo!, AIM/iChat, ICQ, Jabber (and Slack through Jabber), etc.

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…

Instantbird is a cross-platform instant messaging client based on Mozillas XULRunner and the open source library libpurple used in Pidgin.

Miranda IM is an open source multiprotocol instant messaging application, designed for Microsoft Windows.

Bing helps you turn information into action, making it faster and easier to go from searching to doing.

Miranda NG is a successor of Miranda IM, a popular multi-protocol instant messaging client for Windows.

Tkabber is a GPL instant messaging client for the XMPP protocol which uses the Tk toolkit for the GUI.