Campaign HQ's Guide to Villains and Vigilantes

From the introduction: Campaign Headquarters [was] a World Wide Web site dedicated to providing a variety of resources to game masters of Villains and Vigilantes Second Edition, and the more recent Rules Upgrade...Much of the material presented here is generic enough to be used not only with these rules, but with the rules for Champions, Gurps: Super, Heroes Unlimited and most other superhero-based role-playing games.