I wrote a Python program that simulates different RPG dice mechanics (rulesets) and creates graphs showing the probability of the different outcomes: TimZehta/rpgdice · GitHub!
matplotlib is super painful to install on OS X Mavericks 10.9.2. I ended up creating an installation script (install_requirements.sh) to help with debugging the mess and allowing me to reliably reproduce success.
This project was the first time I've worked with ggplot. I'm very glad for the shortcuts it provided. I would love to see it become more well known and successful.