By Cerulean studios about 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.
Without stealing your home page and with no other included software, pop-ups, or spyware, Trillian provides unique functionality such as:
Add multiple messaging clients in one simple interface.
Communicate instantly using the latest version of this popular chat client.
MXit EVO Instant Messenger for your PC, makes it even easier to connect.
Microsoft Office Communicator 2005 is new integrated communications client.
MetroTwit is a slick Twitter client for Windows.