Solar2D is described as 'Lua based cross-platform framework with focus on ease of iterations and usage. ideal for rapidly creating apps and games for mobile devices and desktop systems' and is a game development tool in the development category. There are more than 10 alternatives to Solar2D for a variety of platforms, including Mac, Windows, Linux, iPhone and Android. The best alternative is Godot Engine, which is both free and Open Source. Other great apps like Solar2D are LÖVE, Cocos2d-x, MonoGame and Phaser.
Godot Engine is a feature-packed, cross-platform game engine to create 2D and 3D games from a unified interface. It provides a comprehensive set of common tools, so that users can focus on making games without having to reinvent the wheel.
One framework for creating powerful cross-platform games. The spiritual successor to XNA with 1000's of titles shipped across desktop, mobile, and console platforms. MonoGame is a fully managed .NET open source game framework without any black boxes.
Pygame is a set of Python modules designed for writing video games. Pygame adds functionality on top of the excellent SDL library. This allows you to create fully featured games and multimedia programs in the python language.