Saturn cubeA ring of extensions normally used for a fisher cube applied to make up a ring around a 3x3x3.
Septic TwistFour layers in shapes of heptagons can be turned without jumbling and fudging.
Several TwistThe logical successor of the Twist Cubies: This time one face was twisted by 180° instead of 90°.
Siamese Void PentagonsSecond variant out of a series of Holey Megaminx transformations. This one has two twistable faces left.
Six CubeAn edges only 3x3x3 in shape of a Burr Puzzle.
Sixcone 3x3x3 V1A 3x3x3 truncated with six intersecting cones in a shape closely resembling the Steinmetz solid.
Sixcone 3x3x3 V2A 3x3x3 truncated with six intersecting cones. This time resulting in a heavily concave solid.