[New Lusitania and the Algarves]

I can tell you that usually Nationstates competitions use Xkoronate as their scorinator. There's a dispatch by some nation called The Democratic Judgeship of Nullarni which lists a couple of scorinators, including Xkoronate.
I've used it once or twice, but I'm not the best person to ask how to use all of its' functions, however it's the most complete one for the job, specially if you are going for an Olympiad