The developer preview of Mountain Lion features the all new Messages app which replaces iChat and allows you to send unlimited messages, high-quality photos and videos directly from your Mac to another Mac or iOS device. Messages will continue to support AIM, Jabber, Yahoo! Messenger and Google Talk.
Starting today Lion users can download a beta of Messages from www.apple.com, and the final version will be available with Mountain Lion. Reminders and Notes help you create and track your to-dos across all your devices. Game Center lets you personalize your Mac gaming experience, find new games and challenge friends to play live multiplayer games, whether theyre on a Mac, iPhone, iPad or iPod touch.