"With over 3 million estimated users, Pidgin is an open source
instant messaging program for Windows, Linux, BSD, and other Unix
platforms. It works with AIM, ICQ, Jabber/XMPP, MSN Messenger,
Yahoo, Bonjour, Gadu-Gadu, IRC, Novell GroupWise Messenger, QQ,
Lotus Sametime, SILC, SIMPLE, MySpaceIM, and Zephyr.
"The program can log in to multiple accounts on multiple IM
networks simultaneously and supports many features of the various
networks, such as file transfer, away messages, and typing
notification. long after its first release..."