Pidgin is a chat program which lets you log in to accounts on multiple chat networks simultaneously. This means that you can be chatting with friends on MSN, talking to a friend on Google Talk, and sitting in a Yahoo chat room all at the same time.
Pidgin runs on Windows, Linux, and other UNIX operating systems.
Pidgin 2.7.10 is out and contains a fix for a minor libpurple security issue and a bunch of bugfixes. (Sorry, MSN users, none for you yet.)
Pidgin supports many features of chat networks, such as file transfers, away messages, buddy icons, custom smilies, and typing notifications. Numerous plugins also extend Pidgin’s functionality above and beyond the standard features.