urlGT.com - The most awesome and simple URL Shortener with TOP Features!
Polr - An open source URL shortener. A great non-profit and free alternative to bit.ly, TinyURL, or goo.gl.
Framalink - Free Open-source URL Shortening application
Bitly - Get the most out of your social and online marketing efforts. Own, understand and activate your best audience through the power of the link with Bitly Enterprise.
Btfy - Btfy is a simple, GDPR compliant custom URL shortener tool and branded link management. We don't store any cookie or store any personal data of your users.
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.