Kutt.it - Kutt.it is a free and open source URL shortener with custom domains and stats.
Linktree - Connect your audience to all of your content with just one link.
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.
Shorby - Shorby URL Shortener is an online utility that easily shortens all the URLs and automatically creates short links.
Polr - An open source URL shortener. A great non-profit and free alternative to bit.ly, TinyURL, or goo.gl.
Manylink - One link, multiple URLs ⛓️