Cylinder 3x3x3A hexagonal prism 3x3x3 truncated down into cylindrical shape.
Cylinder-1A Square-1 truncated into cylindrical shape.
Dino CylinderA Dino Cube in cylindral shape with bright black plastic and very reduced stickers.
Fisher's Cylinder CubeThis is an interesting subset of a Rubik's Cube, as almost every piece is duplicated four times.
Floppy Offset DiskThe concept of the Bump Cube (aka Mirror Blocks) combined with the Floppy Cube. All in an cylindric shape.
Gear BarrelA Gear Cube truncated into the shape of a cylinder.
Ghost Barrel 2A Ghost Cube in the shape of a barrel (shaped differently than version 1). Went into mass production.