Godot is a powerful cross-platform game engine
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
Open source HTML5 game framework that offers WebGL and Canvas
One framework for creating powerful cross-platform games
Open game and rendering engine packed into a JavaScript framework
A game framework written with osu! in mind.
Open Source MMORPG Framework
A simple and easy-to-use library to enjoy videogames programming
You can make it - Open Source MMORPG Platform
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.
ThinkPHP Framework
Gideros Release version
Self-hosted CMS platform based on the Laravel PHP Framework
CTFs as you need them
Game engine supporting many 3D/2D formats and graphic effects
A Complete WebGPU Game Engine for Browser & Desktop Arcade Oriented
Orx: Portable Game Engine
Arianne is an engine to develop multiplayer online games like Stendhal
All-In-One program that combines multiple Fortnite Dev Account tools.
SDL based generic 2D game engine