PixelMe - URL shortener for savvy marketers
Trotto - Open-source internal URL shortener for teams, up in minutes
Short.io - Short.io makes short links (vanity urls) on your own domain. Free signup, analytics and API. Chrome, slack, zapier and segment integrations.
SaaS Marketing Stack - A large library of 500+ tools to help SaaS marketers & founders to help with their overall growth efforts across channels.
chl.li URL shortener - A simple, modern, free and privacy-friendly URL shortener.
Zero Width Shortener - Shorten URLs with zero-width characters