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
One framework for creating powerful cross-platform games
Desktop/Android/HTML5/iOS Java game development framework
Real Time Strategy game engine supporting early Westwood classics
Open game and rendering engine packed into a JavaScript framework
Fast and lightweight JavaScript game engine built on WebGL and glTF
Open source HTML5 game framework that offers WebGL and Canvas
Open Source MMORPG Framework
CTFs as you need them
lua dev plugin for unreal engine 4 or 5
Open source library for creative expression on the web, desktop, etc.
A game framework written with osu! in mind.
Gideros Release version
ThinkPHP Framework
You can make it - Open Source MMORPG Platform
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
TX Library is a tiny graphics library for Win32 written in C++.
Game engine supporting many 3D/2D formats and graphic effects
JavaScript framework to build game engines, games, emulators and apps
Ze Text Adventure game Builder : Create as you play !