In part just to see how quick I could write it, I copied a lot of the http://randomizer.org/ functionality to a new Drupal module called randomizer. It performs server-side random number generation, so it's not javascript dependent, like randomizer.org.

I didn't implement some of the features because I have other things I need to move on to, but the list people can sponsor me to finish is: markers, alternate random number generators (e.g., PHP's rand() vs mt_rand()), seeding, MS Excel export, randomize form input, or anything else you might want in your own version.