Just updating:

IBagginsbill has a great program that uses scripts to create shaders.  It's a great program and best of all it's FREE.  Have a look. Give it a try.  You'll  love it!!!

Download Matmatic Here

Matmatic Related Links at RDNA are as Follows:

Matmatic Beta Offer
Matmatic Starfield for Space Renders
Matmatic Demo - Mixing nodes tutorial script
Matmatic Bricks
Matmatic Plaid
12 Simple Materials
Polka Dots
procedural bruising
Reptile Scales
Snake Scales
Jessi Algorithmic Eye Makeup
Matmatic Jessi Skin Demo
Hints & Tips of making Poser Seawater
More on the water material
Tiny Fibers
Matmatic car paint
Matmatic fur
Paramatic
Matmatic Chainmail
Matmatic Chainmail Version 2
Vargas Shader
Matmatic Ultra Basic Skin
Candles

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi