some interesting items found here
3X3X3
All-In-One Bandaged Cube
The mass produced brother of the Ultimate Bandaged 3x3x3. This version uses flat tiles instead of Lego bricks.
Two-Faced Cube
A 3x3x3 with stickers covered with lenticular lenses. Whether it looks solved depends on the view angle.
CUBE (SHAPE PRESERVING)
2x2x50
Puzzle like these are designed for the design's sake.
CUBE (SHAPE CHANGING)
2X2X2X2
A Junior Bump Cube (aka Mirror 2x2x2) with transparent extensions. There are two solved states.
OTHER SHAPES
Anarchy Cube
A cube meant to be a challenge. Can it be twisted into a cube?
Counter Twist
Colours rearranged on a proportional Twist Cubies run counter to the physical twist.
MOVING HOLE
Aquadron
World's first rotational-gravity puzzles based on a cubic structure. This puzzle is filled with water.
OTHER MECHANISMS
Abyss
A puzzle which is based on the fourth dimensional symmetry (edge-transitivity) of the 4D polytope 8-cell (also known as Hypercube or Tesseract)
Brainstring Advanced
An improved design and an additional set of strings set this version apart from the original.
Pyramus & Thisbe
A puzzle which is based on the fourth dimensional symmetry (edge-transitivity) of the 4D polytope Tetrahedral prism