Pidgin.com - Aggregator for All Messenger Clients

Pidgin is an instant messaging aggregator for Windows, Linux, BSD, and other Unixes. It supports the following clients: AIM, ICQ, Jabber/XMPP, MSN Messenger, Yahoo!, Bonjour, Gadu-Gadu, IRC, Novell GroupWise Messenger, QQ, Lotus Sametime, SILC, SIMPLE, and Zephyr. You can do almost all the same things you would normally be able to do on your AIM client, chatting, transferring files, putting up away messages, and costumization features. There are also features which are specific to your Pidgin account that you might not be getting with your original messaging client. Pidgin operates well under the Windows System Tray, KDE 3.1 and Gnome 2 system tray. You will be able to stay online under all of your clients without having to see your buddy list all the time. You can now download version 2.0.0 under the new name, Pidgin, they were formerly Gaim before their re-launch.

“Pidgin can log in to multiple accounts on multiple IM networks simultaneously. This means that you can be chatting with friends on AIM, talking to a friend on Yahoo Messenger, and sitting in an IRC channel all at the same time.