For Windows my favorite tool is SpaceMonger version 1.4 (last freeware version). For some reason I find the layout algorithm very pleasing and the nesting easy

For Windows my favorite tool is SpaceMonger version 1.4 (last freeware version). For some reason I find the layout algorithm very pleasing and the nesting easy to read. Other apps tend to put too many little rectangles too close together and it becomes unclear which files belong to which directory. Also I really dislike the popular "pillow" effect.