Trillian for Windows

Trillian is a fully-featured, standalone, skinnable chat client. It supports AIM, ICQ and MSN as well as Yahoo Messenger and IRC. It offers features not possible with original network client, as well as standard features like audio chat, file transfer, group chats and buddy icons.

Trillian is a unique software that allows you to access the following functionality without stealing your home page.

Contact message history, powerful skinning language, tabbed communication, global status changes (settle all networks away at once), instant lookup (automatic Wikipedia integration), alerts, advanced automation system to trigger events based upon anything happening in client, docking. There are hundreds of emoticons, emotisounds and shell extensions for file transfer.