If you're more into wargaming, VASSAL has been around forever, each game module gives you virtual versions of maps, counters, charts, dice, etc so you can play

If you're more into wargaming, VASSAL has been around forever, each game module gives you virtual versions of maps, counters, charts, dice, etc so you can play whatever games you own (or many have rules and everything you need to play anyway). It acts like a virtual tabletop for hundreds of games.