It's been awhile since I've gone searching the Internet for free brushes to use in Photoshop. Let's see what's new since my last search.
If you haven't been to Brush King, then you need to rush there now. With thousands of brushes, divided into 15 categories, you'll need a couple of hours to explore all that this site has to offer. Since I'm always searching for grunge brushes, I was thrilled to find these by lpnotika.
You'll find some of the same brushes, but some new ones, too, at Brusheezy. I'm a big fan of the brushes by Rubina119 from Deviant Art, especially the Beser Brushes.
Another favorite site is 500ml Brushes. I'm especially fond of the vintage brushes found here. Here's a set for the upcoming season.
But if I could have only one artist's brushes on my desktop, they'd be those of Eduardo Recife. His grunge brushes are my faves. While you're there, be sure to check out his awesome fonts, as well.