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
Fast and lightweight JavaScript game engine built on WebGL and glTF
Real Time Strategy game engine supporting early Westwood classics
Desktop/Android/HTML5/iOS Java game development framework
One framework for creating powerful cross-platform games
Open source library for creative expression on the web, desktop, etc.
Open Source MMORPG Framework
Open source HTML5 game framework that offers WebGL and Canvas
Open source library for N64 development
ThinkPHP Framework
You can make it - Open Source MMORPG Platform
A game framework written with osu! in mind.
CTFs as you need them
Gideros Release version
Unity3D Client And C# Server Framework
Self-hosted CMS platform based on the Laravel PHP 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
Orx: Data-Driven Game Engine
PyCAPGE - Python Classic Adventure Point and Click Game Engine
Old-school 2D game engine