A third collection that features geometric and topological structures that don't neatly fit into existing categories on this site or are too few in number to warrant their own page.
structure: Octahedral polylink
components: triangles
structure: knot
components: squares
structure: Roelofs octahedral polylink
components: triangles
structure: Roelofs octaherdal polylink
components: triangles
structure: Triangular rotundal knot
components: triangles
structure: trefoil knot
components: squares
structure: Kepler icosidodecahedral crinklehedron
components: pentagons
structure: Kepler icosidodecahedral crinklehedron
components: triangles, pentagons
structure: Kepler icosidodecahedral crinklehedron
components: hexagons, pentagons
structure: Escheresque cubic polyknot
components: triangles
structure: Stewart Tessellink
components: octahedra, square antiprisms
structure: Escheresque twist dodecahedral polyknot
components: triangles
structure: Grossman cubic polylink
components: squares, pentagons, dodecahedra
structure: Kepler-Holden octahedral polylinknot
components: squares, hexagons, octagons
structure: Stewart dodecahedral polytoroid
components: pentagonal prisms, j63s, dodecahedra
structure: Holden polysurface
components: triangles, squares