This isn't a github repo - but I think it's an excellent resource and worth mentioning here: The Architecture of Open Source Applications (http://aosabook.org/e

This isn't a github repo - but I think it's an excellent resource and worth mentioning here: The Architecture of Open Source Applications (http://aosabook.org/en/index.html http://aosabook.org/en/index.html) edit: I don't see why this is down-voted, the OP asked about examples of high-quality code, structure and design are also a large part of this and it's not hard to find the github-repo for any particular application mentioned in the above book. Furthermore a lot of examples of excellent code are not necessarily easy to approach with the 'open some random files and start reading approach', having a high level overview often helps.