high quality, complicated django projects to learn from

What are some of the opensource django proje开发者_运维知识库cts that are well designed and written and could benefit learners. For example, if I want to learn more how classy generic views work in the field, I'd like to see how it's implemented in a large website.

ReviewBoard is one I have had a look at a couple times - https://github.com/reviewboard/reviewboard