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

Multiple puzzles with connected moves
1x3x3x2The simplified cousin of Oskar van Deventer's Dumbbell Cube
Bram's FortressEight cubes which outwards going faces twist connected to each other in sets of four faces.
Cube TwisterEight 3x3x3s connected into one massive puzzle with interconnected movement.

DoubleminxTwo Pyraminxes with moves connected by a gearing mechanism.
Dumbbell CubeTwo 3x3x3s connected with a complex mechanism. Every turned side is followed by one side of the other cube.
Dumbbell SkewbTwo Skewbs (or better: Holey Skewbs) connected with a complex mechanism. Every turn is followed by one turn of the other Skewb.

Meshing DominoesA square and a pentagonal domino connected with gears.
Odd ConnectionA 1x3x3 and a Tetraminx fused into one puzzle.
Psi Quantum EntanglementThe successor of the Quantum Entanglement with inverted gearing.

Quantum EntanglementFour 2x2x2s arranged in tetrahedral shape. Every side's rotation is linked to the rotation of another cube.

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