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

Floppy TriangleA Floppy Cube was transformed into the shape of a triangular prism.
Flower BlocksA sample of the Mirror Blocks truncated and restickered.
Fluffy CubeThe world's first in Wavy-style Rubik's 3x3x3 Cube.

Fortress Cube 2Nine 3x3x3s fused into one puzzle.
Fractal CubeA twisty puzzle that is self-similar.
Fractured Rainbow 3x3x3A 3x3x3 truncated on all eight corners in a strange but symmetric way.

Framed CubeA 4x4x4 reduced to the maximum! The inner 2x2x2 is visible and has to be solved too.
Fully Functional Fused 2x3x3A Siamese 2x3x3 which allows additional unexpected moves.
Fully functional Siamese 2x2x2The first Siamese puzzle that can intermingle pieces between the parts.

Fully functional Siamese 3x3x3It looks like a pair of Siamese Cubes but it allows to exchange pieces between the halves.
Gear ChangeA gear cube transformed into the shape of a rhombic dodecahedron.
Gear Cube Extreme (aka Anisotropic Cube)A Gear Cube with four geared edges replaced with four non-geared edges.

Gear ShiftA 3-D puzzle solely based on gears.
Gear SnakeFour 2x2x2s connected to each other with several gears. These force the 2x2x2s to move together.
Geared 5x5x5A 5x5x5 with gears.

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