bit - Fast, lightweight, resource-efficient, compiled URL shortener. MITDocker/Crystal
Chhoto URL - Simple, lightning-fast URL shortener with no bloat (fork of simply-shorten). MITRust/Docker
clink - A super-minimal link shortening service written in pure C, focusing on small executable size, portability, and ease of configuration. (Demo, Source Code) AGPL-3.0C
Flink - Create QR Codes, embeddable link previews for your website and crawls/scrapes metadata. (Demo) MITDocker
Just Short It! - A KISS, single-user URL shortener that runs in just one container. MITDocker
Kutt - Modern URL shortener with support for custom domains and custom URLs. (Demo, Source Code) MITNodejs/Docker
rs-short - A lightweight link shortener written in Rust, with features such as caching, spambot protection and phishing detection. (Demo) MPL-2.0Rust
Shlink - URL shortener with REST API and command line interface. Includes official progressive web application and docker images. (Source Code, Clients) MITPHP/Docker
Simple-URL-Shortener - KISS URL shortener, public or private (with account). Minimalist and lightweight. No dependencies. (Demo) MITPHP
YOURLS - YOURLS is a set of PHP scripts that will allow you to run Your Own URL Shortener. Features include password protection, URL customization, bookmarklets, statistics, API, plugins, jsonp. (Source Code) MITPHP