Outline Server - A proxy server that runs a Shadowsocks instance for each access key and a REST API to manage the access keys. (Source Code) Apache-2.0Docker/Nodejs
Privoxy - Non-caching web proxy with advanced filtering capabilities for enhancing privacy, modifying web page data and HTTP headers, controlling access, and removing ads and other obnoxious Internet junk. GPL-2.0C/deb
sish - HTTP(S)/WS(S)/TCP tunnels to localhost using only SSH (serveo/ngrok alternative). MITGo/Docker
socks5-proxy-server - SOCKS5 proxy server with built-in authentication and Telegram-bot for user management and user statistics on data spent (handy when you pay per GB of data). It is dockerised and simple to install. Apache-2.0Docker
Squid - Caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. It reduces bandwidth and improves response times by caching and reusing frequently-requested web pages. (Source Code) GPL-2.0C/deb
txtdot - A HTTP proxy that parses only text, links and pictures from pages reducing internet bandwidth usage, removing ads and heavy scripts. (Demo, Source Code) MITNodejs/Docker