Hut 4x4x4A higher order cousin of the Uncanny Cube.
Hut 5x5x5An even higher order cousin of the Uncanny Cube.
HX-CubeThe concept of the "Space Cube" applied to a mass produced Fisher Cube.
Hyper twist 3x3x7A cuboid in the tradition of the Twist cubes but with a 360 degree turn.
iCubeA 3x3x3 four times truncated with spherical cuts into a concave solid.
Ink CubeThis can be viewed as the creators puzzle "Time Machine" reduced to one side.
Insanity HouseA 3x3x3 that combines three different concepts of shape variants.
InvertiminxA megaminx, reduced to three sides, was turned inside-out.
Jagged CubeA cheap piece shuffle from the 1980s. Produced in Taiwan.
Jelly Beans StarA 5x5x5 with transparent resin dice glued on the pieces to form a star.
Jessen's 2x2x2A straightforward (?) shape variant. In this case the shape is Jessen's Orthogonal Icosahedron.
JT-BallA combination of the tricylinder 3x3x3, cornerless cube and an unusual stickering scheme.