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