Adium X 1.1.3 - Multi-protocol instant messenger client. (Free): "Adium is a fast and free instant messaging client which supports AIM, ICQ, Jabber, MSN, Yahoo!, Google Talk, Yahoo! Japan, Bonjour, Gadu-Gadu, QQ, Novell Groupwise, SIP/SIMPLE (Text), and Lotus Sametime. Adium supports beautiful WebKit message display, tabbed messaging, encrypted chat, file transfer, and more. Give it a try; you won't look back.
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MacUpdate - Universal Binary - http://www.macupdate.com/macintel.php