TweetDeck (tweetdeck.com) now owned by Twitter is a Twitter desktop application developed on the Adobe Air interface. Its primary advantage is the notifications you receive when your followers tweet AT you, and when the people you follow tweet. You can also make a tweet straight from your desktop, and Tweetdeck allows for multiple Twitter accounts to be used at once. Tweetdeck is also an application for iOS.

This SonicWALL signature identifies legitimate TweetDeck network traffic.