Saturn cubeA ring of extensions normally used for a fisher cube applied to make up a ring around a 3x3x3.
Saturn Cube Double OctagonAn octagonal prism with two rings (taken from the saturn cube) applied. Looks a Fisher cube with additional extensions on the top and bottom faces.
Septic TwistA strange combination of two strange ideas into one even more strange puzzle: Four layers in shapes of heptagons can be turned without jumbling and fudging.
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.
Sixcylinder Megaminx V3Six cylinders joined in one solid. This time by extensions not truncations but with a different orientation.