Safari Extension: Make It Short

An easy to use and well implemented extension that creates a short url for the current page using one of several popular services.

The short URL is placed prominently at the top of the current window with the URL highlighted, ready for copying.

The options are where you can specify your favorite url shortening service, plus there's an option to use a site's "official" short URL whenever possible, like flic.kr. If that's not available, it will use your selected service.