Micro 1x2x3A 1x2x3 with 6 mm cubies, making it the smallest ever made.
Micro 2x2x3A 2x2x3 handmade from a 19 mm Micro Rubiks cube.
Mixup 3x3x4Another Mixup puzzle by the (re-)inventor of the Mixup Cube. This time a 3x3x4 was "mixed up".
N-CubeA 3x3x4 with some external pieces truncated and internal pieces stickered.
One Layer Square-1The one layered cousin of the three-, four- and two-layered variants. Made from a puck.
Overlapping 3x3x5A 3x3x4 (which is based on a 3x3x5) is modified like the Overlapping 4x4x4 was made out of a mass produced 4x4x4.