Pidgin is a chat program that allows you to connect to accounts on multiple chat networks simultaneously. This means you can chat with your friends on MSN, talk to a friend on Google Talk and sit in a Yahoo chat room all at the same time.
Pidgin runs on Windows, Linux and other UNIX operating systems.
Pidgin is compatible with the following newsgroups: AIM, ICQ, Google Talk, Jabber / XMPP, MSN Messenger, Yahoo!, Bonjour, Gadu-Gadu, IRC, Novell GroupWise Messenger, QQ, Lotus Sametime, SILC, SIMPLE, MySpaceIM and Zephyr. It can support a lot more with plugins.
Pidgin supports many features of these chat networks, such as file transfers, voicemail messages, contact icons, custom smilies, and typing notifications. Many plugins also extend Pidgin's functionality beyond standard features.
Pidgin integrates with the system tray under Windows.