I don't deal with noise shaders that much but there are a lot of examples on Shadertoy. It has a lot of uses depending on what you want, but very often I see noise being used with raymarching to create 3D scenes. I prefer using textures because I can get what I want out of them and noise is a lot of math (noise shaders can get very large very quickly), but I figured a good shader series ought to have a noise function somewhere.
I got this noise from iq of Shadertoy fame. Just a nice little simplex noise:
You can make a mask out of your noise and mix two textures:
Here's a simple hash function:
At this point I've almost got all 52 shaders. I may slow down a bit until I know I can plot the rest of the way. Just want to make sure I've got them right before I post them.
Next: Vertex Displacement...