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

Leesho (4 layers)Four layers and one orthogonal ring of moving tiles.
Master Octagonal PrismA 4x4x4 truncated like an octagonal prism.
MegamorphixAn even higher-order Pyramorphix. This time a 4x4x4 was transformed into tetrahedral shape.

Monroe's MarblesMove the marbles from one column to the next by tilting and turning. Try to get each column a single colour.
Muschel DrehholzFour rings of six balls each.
Odd Extended 3x3x5A 3x3x3 with two additional layers glued onto it just by extension.

Overlapping CubeA combination between a 4x4x4 and a 5x5x5.
PakovalecPuzzle from the Czech Republic. Alternative names are Zylla and Xylinder and Dutch Tube.
PlatypusAlso called: Jackpot/Platypus/Pyrabix/NGP/Xtreme Puzzle.

Platypus SupremeOriginally introduced under the name "Jackpot Supreme".
Platypus UltimateOriginally introduced under the name "Jackpot Ultimate". Lights up when a side is solved.
QuadriA very rare version of the original Swissmad. It presumably never made it into production.

Quarter Cut CubeOne quarter of a cube truncated on only two edges.
Rubik's Cube Next StepsA photo-compendium of alternate solutions for your Rubik's Cube

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