TweetDeck is an Adobe AIR desktop Twitter, Facebook, LinkedIn and MySpace application. Like other Twitter applications it interfaces with the Twitter API to allow users to send and receive tweets and view profiles.
It is the most popular Twitter application with a 19% market share as of June 2009, following only the official Twitter.com website with 45.70% share for posting new status updates.It is compatible with several operating systems including Microsoft Windows, Mac OS X and Linux.An iPhone version was released on the 19th June 2009.
Users can split the program into columns which show different things, for instance tweets from friends. TweetDeck interfaces with Twitscoop, 12seconds and Stocktwits, all of which can appear in separate columns.It also allows users to split the people they follow into groups, a very useful feature to many users. The client supports URL shortening which can be done on-the-fly.