chl.li URL shortener - A simple, modern, free and privacy-friendly URL shortener.
Kutt.it - Kutt.it is a free and open source URL shortener with custom domains and stats.
Short.io - Short.io makes short links (vanity urls) on your own domain. Free signup, analytics and API. Chrome, slack, zapier and segment integrations.
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.
Rebrandly - Rebrandly is the easiest way to create, share and manage branded links.