GOAT codes - Simple, private URL shortener for teams
Shorten.REST - A URL shortener API you can depend on
Rebrandly - Rebrandly is the easiest way to create, share and manage branded links.
PixelMe - URL shortener for savvy marketers
Short.io - Short.io makes short links (vanity urls) on your own domain. Free signup, analytics and API. Chrome, slack, zapier and segment integrations.
Pixela - Record and Track your habits or effort. All by API.