Shorten.REST - A URL shortener API you can depend on
Rebrandly - Rebrandly is the easiest way to create, share and manage branded links.
Miny.app - Miny.app is a free and simple privacy-friendly URL shortener, it can also create custom short links that are easy to share and remember. Miny.app is a 100% privacy-focused tool, it does not track or store any personal information.
PixelMe - URL shortener for savvy marketers
Cutt.ly - Free custom URL Shortener and branded URLs with advanced links tracking and Link Management Platform & API.
chl.li URL shortener - A simple, modern, free and privacy-friendly URL shortener.