Rayground is described as 'Framework for rapid prototyping of algorithms based on the ray tracing paradigm. Its main goal is to help develop, test and share self contained modules that showcase a particular method or technique' and is an website. There are more than 10 alternatives to Rayground, not only websites but also apps for a variety of platforms, including Windows, Linux, Android and iPhone apps. The best Rayground alternative is Bitspace, which is both free and Open Source. Other great sites and apps similar to Rayground are Alma.sh, SHADERed, Shadertoy and Shader Editor.