Godot is a powerful cross-platform game engine
A simple and easy-to-use library to enjoy videogames programming
Desktop/Android/HTML5/iOS Java game development framework
Enables Roblox developers to use professional software tools
Open source HTML5 game framework that offers WebGL and Canvas
Fast and lightweight JavaScript game engine built on WebGL and glTF
One framework for creating powerful cross-platform games
Gideros Release version
Self-hosted CMS platform based on the Laravel PHP Framework
Real Time Strategy game engine supporting early Westwood classics
Open Source MMORPG Framework
ThinkPHP Framework
You can make it - Open Source MMORPG Platform
A game framework written with osu! in mind.
CTFs as you need them
lua dev plugin for unreal engine 4 or 5
Unity3D Client And C# Server Framework
Open source library for creative expression on the web, desktop, etc.
A Complete WebGPU Game Engine for Browser & Desktop Arcade Oriented
Arianne is an engine to develop multiplayer online games like Stendhal
All-In-One program that combines multiple Fortnite Dev Account tools.
Game engine supporting many 3D/2D formats and graphic effects
Orx: Portable Game Engine
Old-school 2D game engine
JavaScript framework to build game engines, games, emulators and apps