Gamers Decide recently released a top ten best sci-fi tabletop RPG list and 4 of the titles, including the top two, can be played on the virtual tabletop Fantasy Grounds right now.
Coming in at #9 on the list is Savage Worlds by PEG Inc.
At #7 is Dune: Adventures in the Imperium from Modiphius Entertainment.
Jumping way ahead to #2 is Traveller by Mongoose Publishing.
And at #1 we have Starfinder from Paizo Inc.