12 large brushes (1280px and larger): water splashes, ripples, drops. You can use them for all sorts of design projects: from flyers and brochures to wallpapers and twitter backgrounds drops nature ripple Water Brushes Vol. 2
Abstract brushes set for photoshop made in CS free from copyright brushes abstract plasma Abstract Plasma
These are basically random shapes that work best when there are many of them. Don't worry about copyright or anything, just use them however, although if you are doing a commercial piece, you don't have to tell me, but it would be nice just to see how you used them. This my first attempt at designing brushes, so I hope you like them arc abstract crazy Arc Brushes