Compass CubeA strangely bandaged 3x3x3. It unintentionally is the first physical implementation of something very close to the imaginary pieces.
Compy SkewbA corner-turning hexahedron with four (no more!) logical layers.
Coner 3x3x3A hybrid between face-turning and corner-turning hexahedron.
Coner 3x3x3 IIA hybrid between face-turning and corner-turning hexahedron. Compared with the first version there are different cuts.
Copter 3x3x3A hybrid puzzle that combines a 3x3x3 and a Curvy Copter.
Crazy 2x2x3A 2x2x3 in hexahedral shape with circles on all six faces.
Cube in cubeA reimplementation of the edgeless 4x4x4, dotted with lego pieces.
Cubic 3x3x5A 3x3x5 in shape of a hexahedron. This allows some moves a true 3x3x5 cuboid would not allow.
Cubic 3x3x6Mass produced cubic 3x3x6. A mixtures of pieces from two different pieces.