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

Customly 3D-printed
Crazy RTA Crazy 4x4x4 in shape of a Rhombic Triacontahedron.
Crazy Senior BarrelThe crazy variant of the Senior Barrel with one fixed circles and one floating.
Crazy Slim PyraminxThe crazy version of the Slim Pyraminx

Crazy Split 1x2x3A 1x2x3 splitted, 'circled', and splitted again.
Crazy Square-1A Square-1 with two circles, one on the top face and the other on the bottom face. These two faces have different movements.
Crazy Super LooperThree circles on one line, each allowing 180 turns with deeper intersections. Plus four additional inner circles.

Crazy Void FloppyA combination of the Void Floppy and the Circle Floppy.
Crazy Yileng 5x5x5A Fisher 5x5x5 with a tilted axis.
CrazyBalls 2x2x2A three dimensional version of CMetrick.

Crescent CubeA hybrid of corner and edge turning cube a little bit more complex than the simplest possible.
Cross StarminxThe concept of the Cross Cube applied to a Starminx.
CrosskubeTwo fishered 2x2x2s fused into one compound solid.

Crucifix CubeA 2x2x2 related to the Cross Cube but only to two dimensions.
Cube 3x3x3 LockedA 3x3x3 with 24 plungers. A concept with great potential that is not realized yet.
Cubic 3x5x7 IIA cubic 3x5x7 3D-printed from scratch as if it was bandaged 8x8x8.

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