Sphere In CubeCross between Rubik's Cube and Rubik's Sphere. Hand crafted mutation cube.
Spiral CubeA 3x3x3 which still has 6 sides but an additional twist. It lies somewhere between a 3x3x3 and a Fisher Cube.
Square-1 CakeA handbuilt puzzle shaped like stacked cylinders. Its building required several techniques.
Staircase CubeModified 2x2x2 cube with extra pieces glued on to form staircase shape.
Star BarrelA 3x3x3 in a shape similar to a barrel. Made as an exercise in casting.
Star of egyptA shape tranformation to 3x3x3 with 4 corners almost removed.
StarpadA Dino dodecahedron more than cut in half. Five out of twenty axis remain.
Stickered TripodA Platypus dyed and stickered to change the look into that of a classic puzzle.
SweetheartA modified 2x2x4 into the shape of a heart.
Swiss BumpA 3x3x3 with an unusual but regular shape and a tilted axis system.
The Knob CubeA 3x3x3 with one set of 4 cubies added to each side.