Side ViewMechanically this is a simple puzzle with four intersecting circles. Innovative is the fact that one can only see the side of the pieces which is still enough to solve it.
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.
Skewb J26A Skewb in the shape of the Gyrobifastigium.
SkewbbickCombination of a skewb and a two layered triangular prism.
Skinny CubeA redesigned and even thinner variant of the Slim Cube.
Slice PentagonA pentagonal layer with two layers reduced to two pieces per edge.
Slide-1A Square-1 with four holes on the top and bottom layer and with additional holes on the sides.
Slideception3D-printed recursion: A moving hole puzzle made up out of moving hole puzzle.
Sliding 1x2x3A 1x2x3 enhanced with the abilities of a Sliding Puck.