Wikipedia
Utalk
uTalk is a free client for messaging between phones and computers. With uTalk you can send free pictures, voice and text to your friends from any social network, chat in groups, and view your friends locations. uTalk supports various protocols such as AIM, Yahoo! Messenger, Windows Live Messenger, XMPP/Jabber, Vkontakte, Odnoklassniki, Google Talk, Gadu-Gadu, ICQ, MobileMe/ iChat and Facebook.