Slice Gear CubeLooks like a 3x3x3 but combines at least four different concepts into one new creation.
Slice KilominxLooks like a cloned Kilominx but allows only slice turns.
Slide AlongCould be viewed as another variant of Peters Black Hole but this wouldn't do the ingenuity of the mechanism any justice.
Slidey 2x2x2It looks similar to a Babyface puzzle but it works like an edges only 3x3x3.
Sliding CubeLooks like a 2x2x2 with a hole. Indeed it is a pure moving-hole-puzzle but a 3D-one.
Sloppy CubeA Melty D modified into the shape of a cube.
Smiley CubeA heavily disguised triamese cube implemented from scratch with a mechanism similar to the void cube.
Spherigear LoopEight spherical gears of which four are turned at any time in conjunction. The very rare case of an abelian twistypuzzle.