Adium is a fast and free instant messaging client which supports AIM, ICQ, Jabber, MSN, Yahoo!, Google Talk, Yahoo! Japan, Bonjour, Gadu-Gadu, Novell Groupwise, 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.
Adium is currently translated into Catalan, Czech, Danish, Dutch, English, French, German, Icelandic, Italian, Japanese, Norwegian, Russian, Simplified Chinese, Swedish, and Traditional Chinese.
What's new in this version: