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

Mark Segedin
Helicopter Hexagonal DipyramidA Helicopter Cube in shape of a hexagonal diypramid. This is not a shape transformation but designed from scratch.
Heptagonal PrismA heptagonal prism with 3 layers stacked upon each other.
Hexagonal prism (6 layers)A fully functional prism with hexagonal shape and 6 layers high.

Junior PrismA Pyraminx transformed into a concave triangular prism.
Master BarrelThe bigger brother of the "Pyraminx Magic Barrel"
Masterball Rhombic DodecahedronA Masterball in shape of a rhombic dodecahedron.

Masterball TetrahedronA Masterball with glue pieces to transform it into the shape of a tetrahedron.
Maxi DogicThe rebuilt version of the Dogic.
Pentagonal prism (6 layers)A fully functional prism with pentagonal shape and 6 layers high.

Rex IllusionA Compy Cube that pretends to be a Rex Cube.
Triaugmented hexagonA UFO combined with a 3-armed Tricky Disky.
Vertex turning Square AntiprismAnother geometry-defying design which allows only jumbling turns.

Void Icosaminx IIA corners only megaminx with twenty holes through the solid.
Void Master SkewbThe "voided" cousin of the Master Skewb.

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