Twitter is the official Twitter application for Mac. It started out life as Tweetie but Twitter were so impressed with it, they licensed it as their official twitter client.
The official Twitter client has long been available for iPhone and Android but its taken the arrival of the Mac App Store to bring it to Mac.
Twitter looks and feels very much like its original incarnation as Tweetie which is no surprise, but is a bit more polished and integrated with Twitter as you might expect. Twitter features the same slick interface with tweets appearing down the right hand side and six buttons down the left to navigate and use it including new tweets, personal messages or trending topics.
One thing that is a bit odd is that the option to write a new tweet is hidden away in the bottom left hand corner of the interface. Of course, once you know where this is, its not a problem but it does seem strange that the developers have chosen to "hide" it like this. Notifications are also limited - a blue box in your Menu Bar is all you get to tell you that a new tweet has been made if the main interface is hidden.
Twitter is a wonderfully slick twitter client and if you liked Tweetie, you'll love it