Mac - Adium
Adium - is a free instant messaging
application for Mac OS X that can connect to AIM, MSN, Jabber,
Yahoo, and more. Released under the GNU GPL and developed by the
Adium team. With Adium, you can connect to any number of
messaging accounts on any combination of supported messaging
services and then chat with other people using those services.
Adium features:
• AOL Instant Messenger (Including ICQ and .Mac)
• Jabber (Including Google Talk and LiveJournal)
• MSN Messenger
• Yahoo! Messenger (Including Yahoo! Japan)
• Bonjour (Compatible with iChat)
• MySpace IM
• Gadu-Gadu
• Novell Groupwise
• Lotus Sametime