GLTreeView is a tool to view all your harddisk contents on a single planar map. You can browse and navigate it just by using the mouse and mousewheel.
But the map doesn't show all files at once, because that would result in a large slowdown. As you zoom in, folders are opened and more details are shown.

Project State

The program is already usable but it's still in development phase. Icons and Shell menus are the next features to integrate.
If anyone is interested in helping developing this tool, just sign in on sourceforge.net.