Are there stand alone high poly tree generators out there?

I have trouble with distributing the leaves on the Sapling Addon. The leaves clump.

I loaded an oak tree preset but the leaves are so few even with the leaves count to 500. They clump.

Arbaro : http://sourceforge.net/projects/arbaro/

Fast reply. Ok I will try that when I hit home.

also Ngplant(opensource).commercial - xfrog,onyx