Godot is a powerful cross-platform game engine
Enables Roblox developers to use professional software tools
A simple and easy-to-use library to enjoy videogames programming
One framework for creating powerful cross-platform games
Fast and lightweight JavaScript game engine built on WebGL and glTF
Desktop/Android/HTML5/iOS Java game development framework
Open source HTML5 game framework that offers WebGL and Canvas
Open game and rendering engine packed into a JavaScript framework
Real Time Strategy game engine supporting early Westwood classics
Open Source MMORPG Framework
ThinkPHP Framework
Self-hosted CMS platform based on the Laravel PHP Framework
Gideros Release version
lua dev plugin for unreal engine 4 or 5
Open source library for creative expression on the web, desktop, etc.
A game framework written with osu! in mind.
CTFs as you need them
You can make it - Open Source MMORPG Platform
Arianne is an engine to develop multiplayer online games like Stendhal
A Complete WebGPU Game Engine for Browser & Desktop Arcade Oriented
TX Library is a tiny graphics library for Win32 written in C++.
Game engine supporting many 3D/2D formats and graphic effects
SDL based generic 2D game engine
An isometric arcade-style game of skill, puzzles and exploration
Orx: Portable Game Engine