Su.pr – URL shortening service by StumbleUpon
Su.pr is the only URL shortener that also helps your content get discovered. Every Su.pr URL exposes your content to StumbleUpon’s nearly 8 million users!
It allows you to post to Twitter & Facebook in one-click and schedule as many posts as you like. You can Track the performance of your posts in real-time, by tracking your traffic, clicks, referrers, Stumbles, and retweets at one place. The feature of Optional custom short-urls helps to preserve your search ranking.
You can also get short URLs on your very own domain (i.e. http://yourwebsite.com/abcd).
You can either free signup for Su.pr or use your current StumbleUpon account, if you have.
via [Techie Buzz]