Weavr - Procedural Textile Shader for Blender [Free Download]

Knittr - Free Procedural Knitwear Shader [Blender]

Br'cks - Procedural Bricks in Blender [Free Download]

Procedural Snakes - Blender [Free Download]

Semi-Procedural Mud Material (Tutorial+Files)

WATR - procedural texture testing

CLDS - procedural cloudscape material