The Illinois High School Association (IHSA) allows referees to recognize good sportsmanship demonstrated during any game. I know that the names are posted on the IHSA web Site but I don't know if there is any other reward. I seem to recall a patch or something.
Here is the IHSA website dealing with Attitue
I think this is a good way to recognize good sportsmanship and I have used it but wish there were more being done to encourage a good attitue.