Godot is a powerful cross-platform game engine
Enables Roblox developers to use professional software tools
Desktop/Android/HTML5/iOS Java game development framework
Real Time Strategy game engine supporting early Westwood classics
Open source HTML5 game framework that offers WebGL and Canvas
Open game and rendering engine packed into a JavaScript framework
A simple and easy-to-use library to enjoy videogames programming
You can make it - Open Source MMORPG Platform
Fast and lightweight JavaScript game engine built on WebGL and glTF
One framework for creating powerful cross-platform games
A game framework written with osu! in mind.
Open source library for N64 development
Open Source MMORPG Framework
lua dev plugin for unreal engine 4 or 5
Unity3D Client And C# Server Framework
CTFs as you need them
Gideros Release version
Self-hosted CMS platform based on the Laravel PHP Framework
Open source library for creative expression on the web, desktop, etc.
ThinkPHP Framework
utility collection for 2D game development in Java; sound-player
Game engine supporting many 3D/2D formats and graphic effects
Orx: Data-Driven Game Engine
Arianne is an engine to develop multiplayer online games like Stendhal
All-In-One program that combines multiple Fortnite Dev Account tools.