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
Real Time Strategy game engine supporting early Westwood classics
Fast and lightweight JavaScript game engine built on WebGL and glTF
Open game and rendering engine packed into a JavaScript framework
One framework for creating powerful cross-platform games
Open Source MMORPG Framework
Desktop/Android/HTML5/iOS Java game development framework
Open source HTML5 game framework that offers WebGL and Canvas
Open source library for N64 development
A game framework written with osu! in mind.
CTFs as you need them
ThinkPHP Framework
You can make it - Open Source MMORPG Platform
Gideros Release version
Open source library for creative expression on the web, desktop, etc.
Self-hosted CMS platform based on the Laravel PHP Framework
Unity3D Client And C# Server Framework
All-In-One program that combines multiple Fortnite Dev Account tools.
Arianne is an engine to develop multiplayer online games like Stendhal
Game engine supporting many 3D/2D formats and graphic effects
utility collection for 2D game development in Java; sound-player
A Complete WebGPU Game Engine for Browser & Desktop Arcade Oriented
Old-school 2D game engine