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 do think you guys are likely the best software company I've ever had dealings with.”
“Filter Forge does more than any of my other plugins all in one spot! I'm a kid in a candy store right now just having fun trying everything out. Fun, fun!”