Excellent idea for a thread Joe thanks. I smell a 'sticky' here.

I'm also going to add one myself, and i would like to see others post links to the same kind of thing here. Let's see if we can really jam this thread full of good stuff.

NOTE: try to keep the links relevant to 'free' stuff for photoshop ok? Thanks!

Here's my link: A Brush Search Engine (not just for Photoshop btw)