Wallpaper group 13 of 17, p3: a hexagonal lattice, point group 3, 3 operations per cell, orbifold 333. Escher's lizards, and triskelion ornaments.
Molecular point groups with their operations and character tables, the 230 space groups with a cell builder, and the 17 wallpaper and 7 frieze groups drawn live. The tool needs JavaScript, and WebGL2 for the 3D views; these are the pages it offers: