Non-Cubical Dice

Subtitle: A Generic Role-Playing Game System

From the Introduction:

Meant to be easy to just pick up and play, Non-Cubical Dice (or NCD, as it will hereafter be referred to) is a generic system in the sense that it can be used with any given scenario, in any genre. It’s built on the belief that you shouldn’t need an accountant’s degree to DM, or a spreadsheet to track your character progression. The aim is to be as simple and minimalistic as possible, without sacrificing depth of strategy or flexibility of application. I’m not going to waste any more of your time, though. Jump right in and see for yourself!