Attached Link: http://www.klausfilm.de/

Makes real nice trees. Kinda purdy, ain't it? ;o). It even looks good without the leaves. Not bad for a free program. Comes in a standalone version or a plugin for Cinema 4D.

It only exports in VRML2, so you'll need a converter like AccuTrans 3D or something.

The leaves and bark textures in the image are mine, but the program has some nice ones that come with it :o).

Laurie