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
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
One framework for creating powerful cross-platform games
Open Source MMORPG Framework
Fast and lightweight JavaScript game engine built on WebGL and glTF
Self-hosted CMS platform based on the Laravel PHP Framework
lua dev plugin for unreal engine 4 or 5
ThinkPHP Framework
CTFs as you need them
Gideros Release version
Open source library for creative expression on the web, desktop, etc.
A game framework written with osu! in mind.
You can make it - Open Source MMORPG Platform
Arianne is an engine to develop multiplayer online games like Stendhal
TX Library is a tiny graphics library for Win32 written in C++.
INSTEAD - Simple Text Adventure Interpreter.
Old-school 2D game engine
Game engine supporting many 3D/2D formats and graphic effects
A Complete WebGPU Game Engine for Browser & Desktop Arcade Oriented
Orx: Portable Game Engine