Another interesting option would be to use MapTools. On the one hand, it seems to have been designed with more mainstream games in mind, but on the other hand, there are a lot of general tools and it does show you the individual results of all dice in the roll, so it would be fairly easy to adapt. I've been using it as a player in a non-Fireborn game, and it seems to work pretty well. It's open source, so it's free.