I made an Octahemioctahedron from John Montroll’s book A Plethora of Polyhedra in Origami
I made an origami square troublewit.
Another John Montroll model, this time from A Plethora of Polyhedra. A sunken octahedron.
I’ve been making some of these platonic solids in origami. Thanks to John Montroll’s books From left to right. A tetrahedron, a cube and an octahedron.