Now the licensed modules still cost, of course, but even without them fantasy grounds is such an amazingly well msde virtual tabletop tool and imo the only reason roll20 ever got off the ground was it had no price to entry Well now fantasy ground has no entry too
One of my absolute FAVORITE parts of fantasy grounds is you can put line of sight on pieces so the dm can set up the encounters ahead of time and the players will wander into things organically