Please post direct links to large, complex, but well designed codebases.
Especially if they contain unusual design patterns that could be worth studying.
I am a lowly and unusually stupid software dev, but I want to be less terrible. I feel like reading large, well designed code bases is a crucial part of becoming better, but I don't have a good list of things to study. Help me out by posting some. Hopefully we can get some code review style discussions going.