TinyURL
TinyURL is a URL shortening service. With a 140 character limit for Tweets, services like this make it possible to squeeze in that much more into each tweet, especially when you want to publish a long website URL.

Traffic rankings are sourced from multiple sources, if available, for the Twitter application. This includes Alexa, and Compete rankings.
February 13th, 2009 at 7:43 PM
[...] Add link to the source page with TinyURL [...]
May 15th, 2009 at 10:26 AM
[...] WordPress plugin that will tweet your posts. The format of the tweet is customizable. Short URLs (TinyURL) are [...]
July 15th, 2009 at 9:16 PM
[...] links via tsort.us, bit.ly, TinyURL, tr.im, and [...]
August 18th, 2009 at 3:46 PM
[...] Shorten URL’s with Digg, Is.gd, TinyURL [...]