Unity / XNA game patcher and plugin framework
Pterodactyl® is a free, open-source game server management panel
MAME is a multi-purpose emulation framework
A lightweight game server framework implemented with Actor Model
Native Android app for Habitica
A beautiful, easy-to-use and ad-free comic and game client
UI Automation Framework for Games and Apps
An MVVM & Databinding framework that can use C# and Lua
A web-based IDE for HTML5 game development. Powered by Phaser
Cerberus Content Management System
Flexible, extensible, and scalable video game matchmaking
Open-source full-stack web development framework built on top of React
Cross platform SDK
A complete framework for Godot to create beautiful and complex AI
a 2D Game Development Framework
Source code for chinese-dos-games-web
3D .NET engine for Windows, Linux, Mac
Lightweight framework for old-school RPG GUI in web!
Make robots for MediaWiki-powered sites!
C++ Framework for slot machine games
The Flixel Power Tools are a set of plug-ins for Flixel 2.5+
StarlingPunk is a framework built on top the Starling library