1/0 VoidA Void Cube with four pieces cut away.
2x2x0A 1x2x2 made even easier.
3 Square in 1Three samples of a Square-1 combined with what looks like a 2x2x2.
3/4 of 4x4x4One fourth of an Eastsheen 4x4x4 chopped away in a puzzle that is still functional.
3D-Skewb cubeA mass produced piece shuffle. The pieces of a skewb and a skewb ultimate were exchanged.
4x4x4 TwistThe concept of Twister I applied to a 4x4x4.