Qlink.me - Link shortener and expander
Shorten.REST - A URL shortener API you can depend on
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
URL Multishortener - The first APP & BROWSER EXTENSION that allows you to shorten links on the fly with the best link shorteners that paid.
Pixela - Record and Track your habits or effort. All by API.