Pidgin: multi-protocol Instant Messaging client

Pidgin is a multi-protocol Instant Messaging client that allows you to use all of your IM accounts at once.

Pidgin can work with:
* AIM
* Bonjour
* Gadu-Gadu
* Google Talk
* Groupwise
* ICQ
* IRC
* MSN
* MySpaceIM
* QQ
* SILC
* SIMPLE
* Sametime
* XMPP
* Yahoo!
* Zephyr

Pidgin is free software. It is licensed under the GNU General Public License (GPL) version 2. This means you are free to use it and to modify it, but if you distribute your modifications you must distribute the modified source code as well."

Trillian

Trillian is a fully featured, stand-alone, skinnable chat client that supports AIM, ICQ, MSN, Yahoo Messenger, and IRC. It provides capabilities not possible with original network clients, while supporting standard features such as audio chat, file transfers, group chats, chat rooms, buddy icons, multiple simultaneous connections to the same network, server-side contact importing, typing notification, direct connection (AIM), proxy support, encrypted messaging (AIM/ICQ), SMS support, and privacy settings.

Trillian provides unique functionality such as contact message history, a powerful skinning language, tabbed messaging, global status changes (set all networks away at once), Instant Lookup (automatic Wikipedia integration), contact alerts, an advanced automation system to trigger events based on anything happening in the client, docking, hundreds of emoticons, emotisounds, shell extensions for file transfers, and systray notifications.

Use Trillian Wherever You Go

Install Trillian on your zip Disk, CD, Diskonkey, or any other type of portable media. Take Trillian, your preferences, and your contact list with you wherever you go. Use a fully functional Trillian anywhere, on any computer with an internet connection instead of online clients with limited functionality such as AIM Express and ICQ Lite.