ImageFX
New in version 3.2 - added the Pixel Convolver Effects. These a really slow, but will maybe provide some inspiration. Here's a list of effects:
Ink Effects
Invert, DarkInvert, Overexpose, Desaturate, Soften, Dullen, Experiment
Pixel Effects
Explode, Diffuse, ShufflePixels, InvertPixels, DesaturatePixels, TweakSaturation, SwitchColours, MakeMoody
Pixel Convolver Effects
Blur, BlurMore, Sharpen, NeonGlow, Emboss, RandomConlvusion, PixelConvolve
Grab the main script here, or that script along with the utility scripts in a Dir8.5 cast here.
For a faster way to create blurs, embosses and similar 'convolver'-type effects using inks (rather than setPixel), check out the 'blur' effect in the AnimFX library.