Wooden CubeThis custom built wooden cube stands about two feet tall.
Workout CubeLooks like a 3x3x3 and is one. But one with a lot of friction. It intentionally dampers the movements.
Yongjun LoveA 3x3x3 with heart-shaped plastic tiles instead of stickers.
ZauberpuzzleFrom Politechnika. Maybe the first DIY kit of a 3x3x3. Was available in at least two languages.
ZeeCubeA 3x3x3 with external and overhang bandaging.
Zeroid CubeThe combination of Circle Cube and Void Cube.