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

Piet Hein
BloxboxA puzzle equivalent to Varikon 2x2x2 but produced way before the cube craze.
Bloxbox (by Piet Hein)An earlier version of the Varikon 2x2x2, signed by the first inventor.
CruxSix pieces in a 3D cross configuration have to be placed and oriented.

TwitchitAnother pattern matching puzzle in dodecahedral shape.

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