PSD Nation is committed to bringing you the very best free Photoshop resources on the net. Check out these great, grunge brush packs.
Sidewalk Oil Stains

Splatter Brush Pack

Dot Splatters

PSD Nation is dedicated to delivering only the latest and greatest Photoshop resources. Check out these great, free brushes from around the web.
Vector Brush Set

Scratch Brush Set

Fractal Abstract Brush Set

Handpicked straight from DeviantART, these free brush packs are a great addition to any collection.
Crazy Circles

War Brushes

Elegant Brush Pack