Penrose BihedronA Void Cube truncated down to just two sides with readded face pieces.
Penrose CubeA 3x3x3 truncated into three round surfaces in a spiral pattern.
Penrose Fisher cubeA shape variant of a shape variant: A Fisher Cube treated like a Penrose Cube.
Penta AxisA 3x3x3 in shape of a pentagonal prism. No cut of the original puzzle is parallel to one of the solids faces.
Perez' TetrahedronNot Apollo's Tetrahedron but Perez's Tetrahedron. It was made from a 3x3x3 instead a skewb.
Petrus CubeA 3x3x3 plus three 1x2x2-blocks that return on their own.