Google Talk

[braindead]

es una porqueria solo funciona con windows XP

"Google Talk also supports standards-based communication clients, which means that Gmail users can access the Google Talk service and exchange instant messages using other clients that support the standard XMPP protocol, such as Trillian, GAIM, iChat, Adium, and Psi. This allows users to access the Google Talk service for instant messaging from all major platforms, including OSX, Linux, and Windows."

http://www.google.com/talk/otherclients.html