Entitas is a super fast Entity Component System (ECS) Framework
An MVVM & Databinding framework that can use C# and Lua
Unity / XNA game patcher and plugin framework
A game framework written with osu! in mind.
Open-source full-stack web development framework built on top of React
Desktop/Android/HTML5/iOS Java game development framework
A simple and easy-to-use library to enjoy videogames programming
Kotlin extensions for the libGDX game framework
One framework for creating powerful cross-platform games
Flexible level editor
MAME is a multi-purpose emulation framework
Free and Open-source Headless CMS and Application Framework
Open source HTML5 game framework that offers WebGL and Canvas
Open game and rendering engine packed into a JavaScript framework
ThinkPHP Framework
Java library that enables cross-platform access to popular native APIs
Lightweight, high-performance HTML renderer for game developers
Drogon: A C++14/17/20 based HTTP web application framework
Self-hosted CMS platform based on the Laravel PHP Framework
Entity Component System (ECS) framework made for C# and Unity
Open Source MMORPG Framework
Lightweight game framework for Roblox
A fresh & lightweight javascript game engine
LÖVE is an awesome 2D game framework for Lua
3D game engine/framework in C, with Luajit and Python bindings now