A web-based IDE for HTML5 game development. Powered by Phaser
UI Automation Framework for Games and Apps
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
The Flixel Power Tools are a set of plug-ins for Flixel 2.5+
StarlingPunk is a framework built on top the Starling library