Mike McDermott's Gear Cube papercraft, as he puts it, a "dumbed-down" version of Hiraku Nakamura's original Gear Cube.
Kudos to Mike for actually making a working version of this - one of last year's most requested models.
Gear Cube Papercraft [Download]
Bevel Gar Papercraft [Related Posts]
Gear Sphere Papercraft
Apple Gear Papercraft
Oval Gear Papercraft