Godot is a powerful cross-platform game engine
A simple and easy-to-use library to enjoy videogames programming
Desktop/Android/HTML5/iOS Java game development framework
Open game and rendering engine packed into a JavaScript framework
One framework for creating powerful cross-platform games
Fast and lightweight JavaScript game engine built on WebGL and glTF
The game engine for everyone
Open source HTML5 game framework that offers WebGL and Canvas
Real Time Strategy game engine supporting early Westwood classics
You can make it - Open Source MMORPG Platform
Open Source MMORPG Framework
CTFs as you need them
Gideros Release version
Self-hosted CMS platform based on the Laravel PHP Framework
lua dev plugin for unreal engine 4 or 5
Enables Roblox developers to use professional software tools
ThinkPHP Framework
Arianne is an engine to develop multiplayer online games like Stendhal
Game engine supporting many 3D/2D formats and graphic effects
A free 3D game engine to create games and realtimes scenes for Windows
TX Library is a tiny graphics library for Win32 written in C++.
ReShade is a generic post-processing injector for games and videos.
INSTEAD - Simple Text Adventure Interpreter.
Orx: Portable Game Engine
Molecular viewer and prototyping framework