Notes
Apple’s upcoming Mountain Lion lets users jot down notes, insert photos and images, and share them with friends or colleagues. Notes interoperate with iCloud, updating across the users’ range of devices.
Notification Center
Mountain Lion will offer a hub that consolidates email, messages, reminders and alerts.
Reminders
The Reminders app, well, reminds users of upcoming tasks.
Game Center
Mountain Lion imports Game Center from iOS, complete with the ability to compete against friends and measure your top scores against those of others.
Messages
This robust app lets users send unlimited messages to others using either a Mac or a mobile device running iOS 5.
With Mountain Lion’s Twitter integration, users can Tweet links and photos from Safari, iPhoto or Photo Booth.
Gatekeeper
Mountain Lion’s security apparatus offers granular control over what can be downloaded onto the Mac.
AirPlay
In conjunction with an Apple TV, AirPlay Mirroring lets users stream content from the Mac to the television screen.
iCloud
Apple’s iCloud has now expanded to the Mac, letting users sync their data across the entirety of the company’s mobile devices, desktops and laptops.
Share Sheets
Many Mountain Lion apps will feature a “share” button for sending links, photos, video and notes to contacts.