OctahinxA Megaminx in shape of a octahedron.
OctaminxA fairly accessible custom build based on the Pyraminx.
OctaStar IIThe successor of the 24-Octahedron. A hybrid puzzle that adds faceturning abilities to the Little Chop.
Okki Gem I (aka Alexanders Gem)A sticker variant of the Okki which transforms the puzzle back into a puzzle equivalent to the 2x2x2. Produced in East Germany but often customly remade.
Okki Gem IIA 2x2x2 Octahedron, also called a Gem or Okki, but with a color pattern reminiscent of the Alexander's Star puzzle.
Skewb DiamondMeffert's build-up and truncation of a Skewb into an octahedron.