Pidgin can use it to do a ton of different things, like connect to multiple instant messaging services at once! You can use AIM while talking on GTalk and checking profiles on Yahoo! The coolest part about Pidgin is that the software is entirely free. No fees, no ads, no anything annoying...

Pidgin (the problem formally known as Gaim) is an excellent little app for connecting to Instant Messaging. This application works with Ubuntu -- actually, it comes standard with Gusty when it s officially released in October. It works with AIM, Yahoo, MSN, Jabber, Google Talk, and a ton of others.