Screw CubeA 2x2x3 in cubic shape enhanced with threads to become a way more complex puzzle
Shift CubeA 2x2x4 with an additional shifting move.
Slice CubeA 3x3x3 reoriented with its solid. It shares some similarities to the Lozenge prism and the Greenhills Cube.
Spax Cube(SP)herical (AX)is cube: An Axis Cube implemented with spherical cuts.
Special HexaminxThis one can be viewed as a Junior Truncated Dogic transformed into the shape of a hexahedron.
Spectre CubeA variant of the Ghost cube designed to have pairs of opposite pieces that are mirroring each other.