Filter Forge is – by quite a margin – the most powerful plug-in we've looked at here. That's because it's a tool for creating plug-ins, both generative texture-creation tools and effect filters.
“I needed rock textures and instead of the usual day it takes me to make one, I was able to make 20! Again – applause to you all.”
Filter Forge is an excellent filter creation tool with a strong community spirit that will enhance your Photoshop creations.”