Empathy - Apps/Empathy - GNOME Wiki!
AQQ Instant Messanger - Download AQQ Instant Messanger and talk with friends with networks like Jabber, GG, GTalk, Facebook i inncyh
Gajim - Full featured and easy to use Jabber client
Skype - Stay in touch with your family and friends for free on Skype. Download Skype today to chat and call on desktop and mobile.
IM+ - Chat everywhere! IM+ is the most widely used mobile IM app! Connect all-in-one to MSN, Yahoo!, Goo...
Pidgin - Pidgin is an easy to use and free chat client used by millions. Connect to AIM, MSN, Yahoo, and more chat networks all at once.