Online since 2002. The most comprehensive site for all around twisty puzzles.

Jean-Claude Constantin
3x3x3 in a boxA 3x3x3 with two solutions. The second one allows it to be put into a wooden box.
5 Sided Cube (aka Ramp Cube)A Rubiks Cube with one edge truncated and two adjacent sides "deleted" by gluing extensions on them.
Case Cube (Cuboid)Elongated Fisher Cube made by Jean-Claude Constantin and rebuilt by Tony Fisher.

Crystal 3x3x3 C4Extended version of the normal Crystal 3x3x3.
Crystal Cube - Small MeteorA 3x3x3 cube with dramatically shaved down corners and center cubie attachments.

Cube In SphereCross between Rubik's Cube and Rubik's Sphere. Hand crafted mutation cube.
Entanglement 3x3x3All corner pieces are connected in pairs with a rope between them. This 3x3x3 is not bandaged by the ropes but the can be easily entangled.
Extended Cuboctahedron54 Cuboctahedron cubies stuck onto a slightly modified standard 3x3x3.

Extended Octagonal 3x3x5An extended version of the octagonal prims. This is just a shape variant, not a fully functional puzzle.
Four Sides Extended 3x3x3A shape variant of the 3x3x3. Four rows of three cubies each were glued onto a 3x3x3.
Four Sides Extended OctagonA shape variant of the 3x3x3. Four rows of three cubies each were glued onto an octagonal prism.

Hooked On The CubeAn exchange puzzle from the IPP17 in San Francisco, August 16-17, 1997.
House 2x2x2A 2x2x2 with extensions that allow many different shapes.
MushroomA 3x3x3 with an additional layer glued on. In shape of a mushroom.

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