X-1.5A 3x3x5 and a 3x3x7 combined into one puzzle.
X-Block SupremeThe concept of the X-Block applied two times to a skewb. A Skewb with looks as if one has fused two X-Block's.
X-Cube (Crossoid)A 3x3x3 with additional layers on four of its sides. It became a member of a whole series similar to the Crazy Plus 3x3x3s.
X-Cube 2The smaller cousin of the Crossoid.
X2 X-CubeA 3x3x3 with two additional layers on four of its sides.
YouCubeThis puzzle tries to answer the question "How strange can a puzzle look like?"
ZicronaminxA hexagonal prims which is three layers high and two layers thick.