As discussed here previously, the Scrum Alliance plays an important role in helping to preserve the Scrum framework through its certification process.
If you’re just beginning to learn about Scrum, you’re probably hungry for introductory materials that break it down to the basics. DZone frequently publishes “Refcardz,” pocket reference guides for developers on pertinent topics, from IDEs to programming languages. A few weeks ago, DZone published one of its best. Authored by Danube CST Michael James, it’s on Scrum and, best of all, it’s free.