Square-1 1/2A Square-1 with the smaller pieces split in halves.
Square-1-IIA two-layer custom modification of the Square-1
Square-1/2A Square-1 bandaged to have identically sized pieces.
Square-2A modified Square-1 where the corners are split into two pieces
Square-3A Square-2 with pieces which were further split up.
Square-4The bigger brother of a Square-2 with even more pieces. The Square-4 is unbandaged so that moves are possible every 18°.
Square-equalA Square-1 in which every piece has equal thickness (degrees) and hence doesn't block moves like its brother. In spite of the name, the Square-equal actually has 4 different kinds of pieces and shapeshifts with every move.
Stair CubeTwo layers of different windmill cubes combines with the middle layer of a Fisher Cube.
Stochastic Cutting CubeA Square-1 (or better: a Star Prism of the Square-1) transformed into hexahedral shape while in midturn.
Stone BlocksA stone-like textured spray paint applied to a Bump Cube.