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

InfiernoA Master Skewb in shape of a hexagonal prism
InfinilabacusThree channels with extremely strong bends.
Infinity LoopA continous loop of 34 marbles, intersecting but split at the same time.

Insanity DodecahedronA 4 Corners Cube in shape of a dodecahedron.
Inverse-1The concept of the Square-1 got inverted in this puzzle. A closely relative to the Split 1x2x3 III but with eight segments.
Inverse-2A similar puzzle to the Inverse-1 but the edges on the middle layer were split into two halves.

IQ LollyA set of three puzzles differing only in size and the number of tiles.
Iron ManA 2x2x2 modelled to resemble the marvel character of the same name.
Ivy CrystalAn "Ivy Cut" rhombic triacontahedron, or a Pyraminx Crystal in disguise.

Ivy FestivalA trapezoidal hexacontahedron with "Ivy" slices.
Ivy FoxAn Ivy Cube truncated into a star-like shape.
JAMmed 1153 Cube11 is the dimension of the cube.
5 is the length ofg the edge blocks.
3 the size of the corner blocks.

JAMmed GigaminxA bandaged Gigaminx using the 'JAMmed' configuration, made to fill an empty slot.
Jane Street CubeA promotional cube featuring Jane Street.
Jewel OctahedronAn edges-only 3x3x3 in shape of a negatively stellated octahedron. It is the octahedral equivalent of the Alexander Star.

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