Character Tables for Chemically Important Point Groups
You might be familiar with the wonderful symmetry site that was (to my knowledge) originally published on the Jacobs University site and with the name change to the Constructor University site. In addition to having wonderful character tables, the site allowed you to enter reducible representations that the site would then reduce. It would also allow you to the full range of molecular motions or select vibrations (both IR and Raman active). The site has disappeared from time to time and it is unclear if it will ever return.