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 can't recommend it enough to any Second Life content creator looking to upsmart and better their craft.”
Resident Enlightenment Manager Linden Lab, makers of virtual world Second Life
Filter Forge is an excellent filter creation tool with a strong community spirit that will enhance your Photoshop creations.”