The Dæmon game engine. With some bits of ioq3 and XreaL.

Python library for analysing .bsp files

Bite-sized QuakeC VM written in C

I propose a new form of logic; Logic Geometry. Dynamic connections, or dynamic geometric logic, or logic through the changing shape of geometry, like a truth table that the truths change and is essentially functional programming, but is logic without mathematics, where the changing shape is the only information.

Libretro port of Tyrquake (Quake 1 engine)

An open-source GoldSrc engine clone (Clean authentic reimplementation without using reverse-engineered code)

Game modification for Jedi Knight II: Jedi Outcast Multiplayer with useful stuff and custom features

JK2MV (Multi Version) is a modification for Jedi Knight II: Jedi Outcast. It supports all three game versions and comes with various features and optimizations.

Play the Quake 2 first-person shooter in your browser! Supports WebGL 1 and 2, and software-rendered modes.

Play the Quake first-person shooter in your browser! True to the original. Supports GLQuake, software-rendered mode, mods, and mission packs.

Further adventures of OGS Engine in Modernland (Alternative way of GoldSrc engine evolution)

Quake engine map parser library

(Non-Official)(Mirror) Zircon Engine - a "DarkPlaces Mark V" project

Source code for cross-platform OpenGL gaming engine

A community mod server for the Quake 2021 Remaster

Quake modding toolkit for R. Can read, export and import Quake bitmap images in WAL and Q1 texture formats, read and export MDL and MD2 models, extract PAK and WAD archives.

SnakeSpasm is a Quake engine supercharged with Python. Based on QuakeSpasm.

Top-down shooter mod for Quake, via the FTEQW sourceport and CSQC.

Star Wars Jedi Knight: Jedi Academy popular RPG-style mod

Unity level design plugin that adds support for Quake .MAP / Half-Life .RMF / Source .VMF, Q1 HL1 .WAD textures, and .FGD export.