2x2x2 DominoA 2x3x3 modified to look like a 2x2x2. It allows 90°-moves only on one of the axes, like the original puzzle it was made from.
2x3x3Custom 2x3x3 cuboid, made from a 3x3x3.
2x3x3 barrelA 2x3x3 designed into the shape of a hexagonal prism.
2x3x3 Domino Cube IA 2x3x3 that allows a special move unknown for a true cuboid and does not allow the middle turn of the normal 2x3x3.
3x4x5 CamouflageA 2x3x3 with cubies glued on three sides letting it resemble a larger cuboid.
Axis BrickAn axised version of the Brick Cube which itself is a Domino with two sides rotated by 90°.