Messages is the instant messaging application of the upcoming OS X Mountain Lion. It is essentially iMessage for the Mac. It also integrates with FaceTime and includes AIM, Yahoo! Messenger, Google Talk, and Jabber clients. But the significant thing about it is it expands iMessage from iPhone, iPod Touches, and iPads to the Mac. That’s a potentially huge bump in the number of users on Apple’s messaging framework and more reason to use Apple products.