The Eclipse Foundation is not-for-profit community that hosts open-source Eclipse projects. You may already be familiar with some of the projects, such as the Eclipse IDE (and web tools), TPTP (for tests), or Mylyn (for tasks).
But do you know about the Eclipse Process Framework (EPF)? With EPF, you can create, document, and publish a custom process. And that's exactly what the Eclipse Foundation community has done for some popular Agile processes.
As a result, you can access documentation on XP, Scrum, or OpenUP online.