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

Geodesic Sphere KnotsA cube depicting pieces of mathematical art.
Giant 4x4x4A 4x4x4 made to be the largest full functional 4x4x4 ever made.
Giant Wall MastermorphixA 3x3x3 Wall Cube in shape of a tetrahedron

GigaReuleauxMinxA gigaminx in shape of a tetrahedron.
Golden Cube 2 ExtremeA sequel to Tony Fisher's classic puzzle, made by the inventor himself. It has some small differences to the original.
Gorgon 2x2x3A 2x2x4 bandaged into a 2x2x3-wannabe.

Gorgon 3x3x3A 3x3x4 bandaged into a 3x3x3-wannabe.
Gorgon 4x4x4A 4x4x5 bandaged into a 4x4x4-wannabe.
Great dodecicosacronA 3x3x3 in shape of the namegiving solid.

GrydlockA crazy lock with 10 intersecting notched bolts. The object is to slide all bolts to the open position.
Half-Proportional 3x3x4 I-cubeSimilar to the Calvin 3x3x4 I-Cube, but with a squished layer. This mechanism is much more simple than the previously mentioned puzzle.
Helicopter + 3x3x3A hybrid puzzle closely related to Dayan Gem II but with some different pieces and with cubic shape.

Helicopter PyramidA Helicopter Cube heavily truncated and slightly extended into the shape of a triangular pyramid.
Heptagonal MegastarA prism with two layers, seven sides and two cuts parallel to each square.
Heritombo CubeA shallower cut variant of the Helicopter Cube with straight cuts that reveals the edge centers and face centers.

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