Kutt.it - Kutt.it is a free and open source URL shortener with custom domains and stats.
Anchr.io - Anchr provides you with kind of a toolbox for tiny tasks on the internet.
Bitly - Get the most out of your social and online marketing efforts. Own, understand and activate your best audience through the power of the link with Bitly Enterprise.
YOURLS - YOURLS is a website that contains all the tools you need to create and launch your very own URL shortener. URL shorteners like bitly or TinyURL are fine for public use, but they offer limited options in terms of URL customization.
PixelMe - URL shortener for savvy marketers
Ok2 Smart URL Shortener - Build, Customize & Manage your links in OK2’s smart link shortener.