Unity / XNA game patcher and plugin framework
A web-based IDE for HTML5 game development. Powered by Phaser
Pymunk is a easy-to-use pythonic 2d physics library
This software is a particle effect editing tool
An MVVM & Databinding framework that can use C# and Lua
Ct.js is a desktop game engine that makes learning programming fun
Gideros Release version
Desktop/Android/HTML5/iOS Java game development framework
The HTML5 Creation Engine
Orx: Portable Game Engine
Delphi Java - VRCalc++ OOSL (Script) and + (Binary Exec Distro)
Delphi : VRCalc++ OOSL & + (Paged List, TextEditor, VRAstroVision ...)
Vivid3D is an open-source 3D engine with powerful 2D UI.
Cross platform SDK
Modern 3D engine and IDE written using C# and C++.
A complete framework for Godot to create beautiful and complex AI
Test project with a 2D platform game developing in Godot 3.1
a 2D Game Development Framework
scriptable game engine with built-in support for 2D graphics and sound
2D game creation software
The Flixel Power Tools are a set of plug-ins for Flixel 2.5+
StarlingPunk is a framework built on top the Starling library