If you are talking about counting successes , yes , it's common and easy on roll20. There are probably many games that use them, Shadowrun being only one of them. As for more detailed support for this, there might be some API(Pro users only) that ycould do more fancy stuff, but as I understand everything is easily done with the base resources existing. Maybe the existing 40K sheets works this way, if the are related rpg-systems? And of course, counting successes isn't in itself a D6-specific thing, WOD games are often d10 based and also works on counting successes, and they have several sheets for the myriad of systems they have done. This will roll 3d6 and count number of rolls higher than 3: /roll 3d6>3