Kutt.it - Kutt.it is a free and open source URL shortener with custom domains and stats.
Rebrandly - Rebrandly is the easiest way to create, share and manage branded links.
PixelMe - URL shortener for savvy marketers
Polr - An open source URL shortener. A great non-profit and free alternative to bit.ly, TinyURL, or goo.gl.
chl.li URL shortener - A simple, modern, free and privacy-friendly URL shortener.
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.