“This summer Apple will release a new version of OS X, code-named Mountain Lion. The OS has a number of improvements including upgraded versions of iCal (soon to be called Calendar), Address Book and the Mail app,” John Biggs reports for The New York Times.

“Mountain Lion includes a number of features that were formerly found only on the iPhone and iPad, including a unique Notifications system as well as a new integrated sharing system for sending a Twitter message with one click,” Biggs reports. “The upgrade looks to be quite compelling, but if you can’t wait for the big cat, here’s how to get some Mountain Lion functionality on your current machine.”

Notifications: Growl
Twitter Integration/Page Sharing: AddThis
Messages: Messages Beta and/or Adium
Reminders: Remember the Milk

Read more in the full article here.