ProtoShade is an interactive OpenGL Shading Language (GLSL) compiler for Android, which allows you to experiment with GLSL Fragment Shaders on a collection of classic 3D models (custom model support coming soon, hopefully).
The app comes with a few built-in examples, so I invite you to at least fiddle with them!
==== Anticipated Feature List ====
- Custom model loading support
- Support for more than one texture sampler
- Tangent-space vectors
- Better Shader saving functionality