UNIT3D-Community-Edition - Complete Private Torrent Tracker built on the PHP Laravel Framework and VueJS. It is primarily aimed for movie/tv trackers. (Actively Developed!)
RidPT - Another Private Torrent framework Project. Built on MixPHP and Zui. (In Early Development Now!)
rartracker - Complete bittorrent tracker written in PHP and AngularJS. (Development Is Dead!)
NyaaV2 - Complete Torrent Tracker written in Python. (Actively Developed!)
NyaaPantsu - Complete Torrent Tracker. An alternative to NyaaV2 written in GoLang. (Development Is Dead!)
U-232 - PHP Torrent Tracker Script. (Development Is Dead!)
Pu-239 - A rewrite of the popular torrent tracker U-232. (Development Is Slow!)
Gazelle - Gazelle is a web framework geared towards private torrent trackers. Although naturally focusing on music, it can be modified for most needs. Gazelle is written in PHP. (Development Is Dead!)
Luminance - Luminance web frontend has a much cleaner structure than Gazelle and is progressing in adding new features. Luminance is written in PHP. (Development Is Dead!)
Oppaitime-Gazelle - Oppaitime-Gazelle is written in PHP and is a fork off Gazelle. Aimed to make it a very secure codebase. (Development Is Slow!)
Orpheus-Gazelle - Orpheus-Gazelle is a fork of Gazelle (written in PHP) and is used by Orpheus. It is primarily aimed at music trackers.(Development Is Slow!)
XBTIT Blu-Edition by BluCrew - PHP Torrent Tracker Script built off the original XBTIT. (Development Is Dead!)
Mika - Go based torrent tracker using redis for a backend and designed for private site use.
Ocelot - Ocelot is a BitTorrent tracker written in C++ for the Gazelle project. It supports requests over TCP and can only track IPv4 peers.
XBT - High-Performance BitTorrent Tracker written in C++.
Chihaya - Chihaya is an open source BitTorrent tracker written in Go. A customizable, multi-protocol BitTorrent Tracker.
Celty - Celty is an open source BitTorrent tracker written in C++. Dead simple, extensible, unix BitTorrent tracker.
Radiance - Based off Ocelot, Radiance tracker supports IPv6 and some other extras that Ocelot lacks. Written in C++.
BitTorrentPHPAnnounceSocketServer - Socketserver in PHP. Written for netvision-source, but extendable.
notorious - A feature-complete, performant torrent tracker written in Go.