The PhotoshopRoadmap has put together a collection of 100 high-resolution brushes for Photoshop that are ripe for the browsing. Some looked more useful than others to me but the quality of the collection is still impressive. The article also provides some choice links to other Photoshop brush resources. Read 100 Awesome High Resolution Photoshop Brushes.
One of the best Photoshop brushes page available. It gathers links to some of the finest brush designers on the web. There you will find some amazing Photoshop brushes sets created exclusively for this site.
Stephanie is a talented artists and a regular contributor to The Photoshop Roadmap. At her site she offers a vast gallery of beautifully designed brushes that you can download for free.
Loads and loads of unique and high quality Photoshop brushes. Go there and download them all.
A great selection of high quality brushes.
An excellent collection of frame brushes of all kind. Lots of creative ideas.
A collection of beautiful classy brushes. Some commercial, some for free. .
Photoshop Brushes directories.
Although I’ve been browsing this site for three days, I wasn’t able to reach the last page of the Photoshop brushes section. Huge Photoshop brushes source. The largest of all sites mentioned in this article.
If you still believe you need more brushes, take a look at this commercial collection.