myPhotoshopBrushes.com

Seems like a very useful (and generous – free?) site!

“myPhotoshopBrushes.com is a great collection of Adobe Photoshop brushes, patterns, tutorials and many useful Photoshop stuff. They are made by artists all over the world and all are free to use. Take a look, find something interesting for you and free download. With us design can be easier than ever.”

http://myphotoshopbrushes.com/