29 of 36Image
Documents in the Cloud allows you to store text documents, pictures, and other content in iCloud and access it from anywhere. No manual uploading required -- simply drag in your files to the window and they will be uploaded to iCloud automatically.
Another new app to "Mountain Lion": Reminders. It's another port-over from iOS 5 and iOS 6, allowing you to see your list of things-to-do on your Mac. It also supports location-based reminders, so you can be buzzed about something when you leave work or arrive back at home.
Another new app: Notes. You can scribble something down on your iPhone, iPad, or iPod touch, and see it live on your Mac. Notes supports iCloud.