"Tall Tweets will help you write tweets that are longer than 140 characters. The tool will slice and publish your "long tweet" into smaller chunks of 140 characters or you can even publish the entire messages as an image. Your Twitter followers will be able to read the entire message in their timeline itself."
Measure the spread of tweets over the world. The speed at which Twitter spreads information is fascinating. Yet looking at your timeline it's not always easy to grasp how tweets participated to the show.
Full Featured, Super Clean Twitter Apps.
Never Read a Tweet Twice/ Echofon automatically keeps unread tweets in sync between your computer, your iPhone and your iPad.
Tweagle is a sleek Twitter client combining the best of Twitter and Foursquare. With Tweagle, users can listen to the voice of the city and easily share their location via Foursquare, checking in and tweeting at the same time.