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.
RocketLink - Rocketlink helps to grow your audience with URL shortener that allows firing retargeting scripts when the link is clicked.
Anonymous URL Shortener - Anonymous URL Shortener, Referer, Anonymizer, Redirection service.
Linkly - Linkly is a tool to help affiliate marketers track clicks and improve revenues.
Lstu - A nice and open source url shortener. You can use it as service or install it on your own server.
Clicksor - Promote your business with today's most effective contextual online advertising and re-targeting technology and behavioral Marketing Services at a cost effective metric of CPC, PPC, CPM or CPV.