facebook.com
Create an account or log into Facebook. Connect with friends, family and other people you know. Share photos and videos, send messages and get updates.
Trillian, the free instant messenger for Windows, MacOS X, Android, iPhone, BlackBerry, Linux, and the Web. Supports Windows Live, Facebook, Twitter, Yahoo, MySpace, AIM, Email, Google Talk, ICQ, Jabber, IRC, Bonjour, and more!