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

Carl N. Hoff
Evil DoppelgängerA special subvariant of the Multi Gear Cube Kit closely related to the Gear Cube Extreme.
Mercury Uniaxial 3x3x3A slight modification of the Deep Uniaxial 3x3x3.
Multi Gear Cube KitA generalized version of the Paso Doble. It allows all kinds of gearing ratios between opposite sides for all three axes.

Neptune DoDep 3x3x3The result of a three year old idea. Although it looks like a 5x5x5 there are only two cuts possible for each axis.
Other 4x4x4 (aka Puzzle 19)Designed to be a 4x4x4 with exposed new theoretical pieces. Although it has 64 pieces it presents itself as a superset of the 3x3x3.
Psi Quantum EntanglementThe successor of the Quantum Entanglement with inverted gearing.

Thorny CubeA Circle Mixup Cube.
TriQuadA non truncated version of Bygride-3-4 with different cuts.
Window Real 5x5x5A 5x5x5 with a 3x3x3 visible inside of it.

XOteric 2x2x2Looks like a Circle 2x2x2 but is a 2x2x2 with the Triwalls as additional piece types.

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