The source code for the Cfx.re modification frameworks, such as FiveM, RedM and LibertyM, as well as FXServer.

Open source reimplementation of GTA San Andreas game engine in Unity

OpenRW "Open ReWrite" is an un-official open source recreation of the classic Grand Theft Auto III game executable

Unified lighting effects across multiple brands and various games.

GTA V Data dumps useful for modding & scripting

This mod replaces original Grand Theft Auto V upscaler with FidelityFx Super Resolution 1.0

Reimplementation of Grand Theft Auto 1 [GTA1]

An SDK for developing ASI/CLEO plugins for GTA San Andreas, GTA Vice City and GTA III

Blender Add-on to edit RenderWare and GTA Formats

A tool to setup your GTA5 firewall rules easily. Adding IPs to your whitelist enables your friends to stay in your session.

Mod Loader for GTA III, Vice City and San Andreas

Project2DFX is a set of plugins for GTA III, Vice City, San Andreas, GTA IV: The Complete Edition, GTA Liberty City Stories and GTA Vice City Stories, which adds LOD corona effect to a game map, making LOD-world look a lot better.

CLEO 4 for GTA San Andreas

GTA SA rendering hook

Experimental JavaScript runtime for GTA 3D era games/GTA IV/Bully

A framework for writing game modes for SA-MP in C#. SA-MP is a free Massively Multiplayer Online game mod for the PC version of Rockstar Games Grand Theft Auto: San Andreas.

A GTA 3 reimplementation on the Godot Engine

A mod menu for Grand Theft Auto III, Vice City & SanAndreas Classic Singleplayer

An open source UI re-implementation based on GTA:V, built for GTA: San Andreas.

The ASI script for the GTA Trilogy (SA only for now, 3 and VC may follow later on)