Bitly is a link management and shortener platform.

Short.cm is a white label link shortener, which allows you to create short links on your own domain.

Rebrandly is the easiest way to create and share branded links (short URLs using your own domain name).

Create ready-to-share links on the fly. Zapier's URL Shortener spits out a simplified version of any link you throw its way. Pass that link to Twitter, drop it in an email, or send it along to any Zapier-connected app.

Shorten.REST is a flexible, robust, scale-able and transactional URL Shortening app.

Pixeljoy is a URL shortening service that lets you retarget your link visitors, advertise to them, manage your branded links, and collaborate.