BlitzMax - With the developing version BlitzMax NG other 'targets' are available: ARM architecture, Raspberry, Android, HTML (Emscripten). RAPID DEVELOPMENT. Just open the IDE, write your code, hit F5 and see immediately the results!
BlitzMax NG - Fast cross-platform, open-source, programming language.
BlitzPlus - Create 2D Games for Windows.
Monkey 2 - An easy to use, cross platform, games oriented programming language
Phaser - Desktop and Mobile HTML5 game framework. A fast, free and fun open source framework for Canvas and WebGL powered browser games.
Godot Engine - Feature-packed 2D and 3D open source game engine.