IMessage



iMessage is an instant messaging service created by Apple. iMessage works with all iOS 5 and beyond devices.

iCloud with iMessage
With the iCloud feature also included in iOS 5, iMessage conversation's are synched to iOS devices linked under a their Apple ID. Shows when the other person is typing. GIF support is added in iMessage.

iMessage with Mac OS X
On February 16, 2012, Apple has announced that iMessages will also be built-in with Mac OS X 10.8, under a brand new name of "Messages". When this is released, it will replace Apple's current instant messaging service, iChat. As of June 1, 2012, you can download Messages beta for free at http://www.apple.com/macosx/mountain-lion/messages-beta/.