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
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
Real Time Strategy game engine supporting early Westwood classics
Fast and lightweight JavaScript game engine built on WebGL and glTF
Open Source MMORPG Framework
A game framework written with osu! in mind.
You can make it - Open Source MMORPG Platform
Unity3D Client And C# Server Framework
Self-hosted CMS platform based on the Laravel PHP Framework
Open source library for creative expression on the web, desktop, etc.
Gideros Release version
ThinkPHP Framework
Open source library for N64 development
lua dev plugin for unreal engine 4 or 5
CTFs as you need them
All-In-One program that combines multiple Fortnite Dev Account tools.
Arianne is an engine to develop multiplayer online games like Stendhal
Old-school 2D game engine
Game engine supporting many 3D/2D formats and graphic effects
Ze Text Adventure game Builder : Create as you play !
INSTEAD - Simple Text Adventure Interpreter.