fTalk is a FREE Instant Messenger that lets you chat with all of your Facebook friends right from your desktop.
The friends list displays friends that are online on Facebook at any given moment, and a tray notification is displayed whenever a friend comes online. You can both send and receive messages on Facebook without ever opening Facebook in a browser.
Windows Live Messenger gives you a way to chat with your friends online. view it
Chat and connect with friends in Windows Live Messenger view it
Windows Live Messenger has evolved into a full-featured IM application. view it
Take a tour of Windows Live Messenger view it
Windows Live Messenger has lots of nifty features that you can play with view it
Windows Live Messenger allows you to customize a variety of options view it
If you have a webcam you can use it with Windows Live Messenger view it