Previously known as Fantasy Grounds Unity, the developers at SmiteWorks have now made Fantasy Grounds VTT free to play.
Originally, this virtual tabletop required someone to spend at least $50 for an Ultimate License (or a monthly fee) to be able to actually host a game with it. Now, all users gain access to the platform without having to spend anything. While the base software is now free there’s tons of content that is not including licensed packs like Alien, Dungeons and Dragons, Pathfinder and so on.
It should be noted that the OGL stuff for D&D is included in the free part, along with the ORC licensed rules from Paizo for Pathfinder 2e. I think there are one or two other systems included as well but I’ve never looked at them.
If BFRPG is one of them due to CC BY license, my producer would be all over that.