The Book of Shaders is described as 'Provides a gentle, step-by-step guide through the abstract and complex universe of Fragment Shaders. Besides scores of insightful illustrations, the site includes a very intuitive live-coding editor for users to easily see changes as they code' and is a Code Editor in the development category. There are more than 25 alternatives to The Book of Shaders, not only websites but also apps for a variety of platforms, including Windows, Linux, Self-Hosted and iPhone apps. The best The Book of Shaders alternative is Bitspace, which is both free and Open Source. Other great sites and apps similar to The Book of Shaders are Alma.sh, SHADERed, Shader Editor and Shadertoy.
Synthclipse is a GLSL shader prototyping tool. It makes possible to fast develop all kinds of shaders: Fragment (FS), Vertex (VS), Geometry (GS), Tessellation (TS) and Compute (CS). Shader development can be done using compatible with Fragmentarium and Shadertoy (but limited to...
Synthclipse is the most popular Mac alternative to The Book of Shaders.
ProtoShade is a GLSL:ES Shader Prototyping Utility for Android. Code shaders on mobile devices while a viewport renders the results transparently in the background.
