There's plenty of open-source ones, Witty (http://code.google.com/p/wittytwitter/ http://code.google.com/p/wittytwitter/) for example, its just that TweetDeck i

There's plenty of open-source ones, Witty (http://code.google.com/p/wittytwitter/ http://code.google.com/p/wittytwitter/) for example, its just that TweetDeck is continously marketed as "the popular client".