Miscellaneous
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).
Simple-URL-Shortener
KISS URL shortener, public or private (with account). Minimalist and lightweight. No dependencies. (Demo).
Shlink
URL shortener with REST API and command line interface. Includes official progressive web application and docker images. (Source Code, Clients).
rs-short
Lightweight link shortener written in Rust, with features such as caching, spambot protection and phishing detection. (Demo).
liteshort
User-friendly, actually lightweight, and configurable URL shortener. (Source Code).
Kutt
Modern URL shortener with support for custom domains and custom URLs. (Demo, Source Code).
Just Short It!
A KISS, single-user URL shortener that runs in just one container.
Flink
Create QR Codes, embeddable link previews for your website and crawls/scrapes metadata. (Demo).
clink
A super-minimal link shortening service written in pure C, focusing on small executable size, portability, and ease of configuration. (Demo, Source Code).
Chhoto URL
Simple, lightning-fast URL shortener with no bloat (fork of simply-shorten).
bit
Fast, lightweight, resource-efficient, compiled URL shortener.
Zammad
Easy to use but powerful open-source support and ticketing system. (Source Code).