PixelArt Material

This FREE Blender Addon lets you create materials in a Pixelart style per button click. It comes with additional features to make life easier. Add materials, revert to original materials, set up color gradients from base color and even add a simple composition which makes your final render look even more like Pixelart.

The technique for creating the material itself goes back to Lucas Roedel: 

Check out my other Blender Addons: