Ambigear CubeA 4x4x4 with "ambiguous gearing" which forces connected movement on one axis.
Bloomy GearsA Gear Cube which gears were cut in three times. This allows the puzzle to be turned like a 2x2x2.
Bram's CubeA 2x2x3 cuboid with a split and geared middle layer.
Bram's Cube PlusImproved version of Bram's cube with six-teeth-gears and exposed slider pieces.
Clockwork 4x4x4A 4x4x4 with all layers of one dimension linked into one coordinated movement.
Crazy GearAn axised variant of the Gear Cube from the same inventor.
Cube BouchonA 3x3x3 which opposite sides are connected with gears. These gears make the sides to twist in different ratios during one full turn.
Evil DoppelgängerA special subvariant of the Multi Gear Cube Kit closely related to the Gear Cube Extreme.
Gap CubeA variant of Polo Gear Cube. The inventor removed one tooth on every face.