ePublisher D20/OGL Guide

Detailed Guide to Open Licenses - Plus Bonus Material From the introduction: This guide is a book of advice, knowledge and information resources to assist and enable you to publish your own Open Game material. This might be a supplement based around the well known Open Gaming version of the d20 system, it might by an implementation of another open system such as the Action! System or Dominion Rules, or it might even be your own home-brewed creation.