Load a molecule or build one, and the site assigns its point group: every axis, plane, centre and improper rotation it found, each one drawn on the structure and animated as it acts.
The character table of the group comes with it, and so does the reasoning — which operation ruled out the neighbouring group, and why.
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: