LittleJS is described as 'Fast lightweight open source HTML5 game engine for modern web development. Its small footprint is packed with a comprehensive feature set including hybrid rendering, physics, particles, sound effects, music, and input handling' and is a game development tool in the development category. There are more than 10 alternatives to LittleJS for a variety of platforms, including Windows, Linux, Mac, Web-based and Android apps. The best LittleJS alternative is Godot Engine, which is both free and Open Source. Other great apps like LittleJS are Unity, Unreal Engine, GDevelop and Defold Engine.