TweetDeck [Twitter App]

TweetDeck is your personal browser for staying in touch with what’s happening now, connecting you with your contacts across Twitter, Facebook, MySpace, LinkedIn and more.

With TweetDeck anyone can tweet like a Pro. Customise your Twitter experience with columns, groups, saved searches and automatic updates helping you to effortlessly stay updated with the people and topics you care about. See what people are saying about you and join the conversation by tweeting, sharing photos, videos or links directly from TweetDeck. We like to think of it as air traffic control for Twitter.

Link: http://www.tweetdeck.com/