This app is designed to give Risk players an idea of their chances of conquest based on the number of armies in the territory they are attacking from and the number of defending armies. The output is designed to give a high level overview of your chances (should I do it or not) along with a detailed view of all the possible outcomes if you fight to the last man.
Some color adjustments make it a little more fun and are designed to match classic colors. There's also a scenario tool to calculate your chances of surviving with a certain number of armies still standing (in case you want to repel counterattacks).
My dream has been to play an 'augmented' Risk game allowing all players to use the tool, but I still haven't done it.