Think Puzzles PyraminxA Pyramorphix which package does not mention this name. A high quality 2x2x2 production by Mefferts.
TriangulumA Starminx in shape of a tetrahedron. It was designed from scratch.
TribulusMorphixA puzzle in shape of the Tribulus but made from a Mastermorphix aka 3x3x3.
UltramorphixA 5x5x5 modified into a truly tetrahedral shape.
Windmill TetraA Windmill Cube transformed into the shape of a tetrahedron.
XenomorphixA tetrahedron made from a 3x3x3. This one was "fishered". Means: Its axis system was twisted by 45° inside its solid.