It's very easy to get the code of an opensource project, but it's different for the higher level artifacts.
Is it because it's called open source, is it because I can't find it, or what? Is there a place where I can get some good projects to study?
You might be interested in ReadySET, which is a Tigris project. They provide a number of templates for standard documentation - project proposals, planning, QA, design, test, releases.