OSL Noise
The OSL Noise group is a series of scripts that generate a variety of noise patterns. Several scripts are included:
BGNoise
BGNoise6
cellularNoise
flowNoise
FractalFlowNoise
GaussianBlur
MAGaborNoise
pixel-flow1
pixelate
SimplexNoise
volumedisp
bgnoise
The BG noise script is a versatile noise generator, offering 12 different noise types, as illustrated below.

bgnoise 6
The BG noise 6 script is a versatile noise generator, offering 9 different noise types, as illustrated below.

Cellular Noise
The Cellular noise script generates a cellular noise pattern, with controls for the pattern color, background color, cellular frequency, radius, blur, and jitter.
Flow Noise
The Flow noise script generates a noise with a flow field applied, with various controls for the look and size of the flow field.
Fractal Flow
The Fractal flow script
Pixel Flow 1
The MA Gabor noise is a script that applies Gabor noise.