ShaderLab is described as 'The WebGL2 GLSL Editor for the browser. Code your shaders right in your browser with a live view to progress in the background. Then share and garner feedback through comments and check out other creators' and is a Code Editor in the social & communications category. There are more than 25 alternatives to ShaderLab, not only websites but also apps for a variety of platforms, including Windows, Linux, Self-Hosted and iPhone apps. The best ShaderLab alternative is Bitspace, which is both free and Open Source. Other great sites and apps similar to ShaderLab are Alma.sh, SHADERed, Shader Editor and Shadertoy.