Godot is a powerful cross-platform game engine
Open source HTML5 game framework that offers WebGL and Canvas
Desktop/Android/HTML5/iOS Java game development framework
One framework for creating powerful cross-platform games
A simple and easy-to-use library to enjoy videogames programming
Open source library for creative expression on the web, desktop, etc.
Gideros Release version
Enables Roblox developers to use professional software tools
Real Time Strategy game engine supporting early Westwood classics
Fast and lightweight JavaScript game engine built on WebGL and glTF
Open Source MMORPG Framework
Self-hosted CMS platform based on the Laravel PHP Framework
CTFs as you need them
ThinkPHP Framework
You can make it - Open Source MMORPG Platform
lua dev plugin for unreal engine 4 or 5
A game framework written with osu! in mind.
A Complete WebGPU Game Engine for Browser & Desktop Arcade Oriented
Orx: Portable Game Engine
INSTEAD - Simple Text Adventure Interpreter.
Game engine supporting many 3D/2D formats and graphic effects
Arianne is an engine to develop multiplayer online games like Stendhal
Old-school 2D game engine
PyCAPGE - Python Classic Adventure Point and Click Game Engine
JavaScript framework to build game engines, games, emulators and apps