Phaser is described as 'fun, free and fast 2D game framework for making HTML5 games for desktop and mobile web browsers, supporting Canvas and WebGL rendering' and is an app in the Development category. There are more than 50 alternatives to Phaser for a variety of platforms, including Windows, Mac, Linux, iPhone and Android. The best alternative is Godot Engine, which is both free and Open Source. Other great apps like Phaser are Unity (Freemium), GDevelop (Free Personal, Open Source), LÖVE (Free, Open Source) and Wick Editor (Free, Open Source).
Imagine Engine is an ongoing project that aims to create a fast, high performance Swift 2D game engine for Apple's platforms that is also a joy to use with an ambitious but clear goal - to enable you to easily build any game that you can imagine.