dice
Dice is a package by ingvar written in Common Lisp for rolling dice and tabulating possible results for a given dice combination. Recent changes involve fixing a bug in the tabulation code and making sure to use a package-internal RANDOM-STATE (initialized on the first call to DICE:ROLL). There's also code to format a probability table in HTML format. This package is now released as v1.0.

ASDF-install package (obsolete) http://www.hexapodia.net/src/dice.tar.gz