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