Xfire 1.69

[anandk]

Xfire is the instant messenger for gamers. See when your friends are playing online games; See what game they are playing; See where they are playing; and join their game with just one click. Plus, unlike existing Instant Messengers, this one lets you receive IM's without disrupting your game.

http://www.xfire.com/

[rakeshishere]

Another Similar utility is teamspeak (http://www.goteamspeak.com/index.php?page=about)

[Hells_Fury]

There already is a thread in this section on XFire...