Does anyone know a good dice rolling app? I know most of them are o.k. at best. My group has limited space I am debating on allowing dice roller amps because of the sometimes large dice pools people may have.

I use DieDroid. It's small, FOSS, and can automatically count successes and failures. Only problem is that it doesn't store your settings, after closing the app you need to configure "use D6, fives and sixes are successes, ones failures" again.

Thanks. DL'd it. It looks pretty good.