T2M - T2M URL Shortener is an all-in-one link management platform which focuses on quality of service with easy-to-use interface at affordable price, backed by exceptional customer support.

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.

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.

Lstu - A nice and open source url shortener. You can use it as service or install it on your own server.

Anonymous URL Shortener - Anonymous URL Shortener, Referer, Anonymizer, Redirection service.

Moourl - Moourl will let you shorten the massively long and complex URLs that you obtain from YouTube or other sites.