Tolkeinesque mountain brushes for Photoshop and Gimp
While I was google-hopping today, I ran across a photoshop tute website that offers a download of some tolkienesque mountain brushes.
I found them on BestPhotoshopTutorials.net
However, the actual brushes come from a deviantArt page, which offers those same brushes, and an expansion pack.
There is a also GIMP conversion (which contains both sets), and is approved by the author/artist, found right here.
Edit: I should add that these brushes are free to use, according the the artist/creator.