Gear OctahedronA shape transformation of the Gear Skewb. It is an octahedral Master Skewb with gears.
Ghost OctahedronThe immediate follow-up of the Axis octahedron. After axising a face turning octahedron he ghosted it.
Holey OctahedronA void Trajber's Octahedron. Rather than having holes at the tips, this one has holes in the faces.
Jet DiamondA "Corner Cube" transformed into an octahedron.
Lolo's octahedronA 2x2x2 with an additional layer on each side. It behaves like a subset of a 4x4x4.
Master Skewb diamondA master skewb transformed into octahedral shape. Also appropriately described as face-turning octahedron with central face pieces.