Professor OctaminxA 7x7x7 transformed into the shape of an octahedron but with several pieces left out.
Projective Dino OctaA Dino Octa where turns are reduced to slice turns only. The stickers are choosen appropriately with opposing sides stickered equally.
Radio 3 OctahedronA Radiolarian 3 (a face turning icosahedron) redesigned to have the shape of an octahedron.
Royal OctahedronNot the first puzzle with the axis system of a corner turning cube and five logical layers. But it is the first one in shape of an octahedron.
Shadow OctahedronA Face turning tetragonal trapezohedron in the shape of an octahedron and with two additional doctrinaire cuts on the top and bottom corners.
Skewb DiamondMeffert's build-up and truncation of a Skewb into an octahedron.