Adium is a free instant messaging protocol system for Mac OS X that supports multiple IM networks, including MSN
Messenger,
Yahoo!
Messenger, Google Talk, AIM, ICQ, Tencent QQ, Facebook Chat, Skype (with a plugin), Twitter, MySpace IM and much more. Downloading the program is easy and straight forward. You can open multiple protocol accounts at a time. There are many IM
applications out there today that do not support the Mac system and only those with PCs are able to access. With this program Mac users are now able to chat with people worldwide without having to switch to PC operating systems.