New version of operation system called OS X Mountain Lion brings more than 100 new applications. I must mention a few.
– Messages, which enables you to communicate for free and it uses the same technology like iMessage. (Messages is avaiblae in BETA version)
– Notification Center, which hold all the news (similar to iOS).
– Reminders and Notes are transfered basically from iOS.
– Game Center, which enables new abilities to share your content, better integration with twitter.
– From OS X Mountain Lion to Apple TV you can stream Live picture through AirPlay technology.
Operation system X mountain Lion is coming in summer (2012)!