Ask HN: What open source project, in your opinion, has the highest code quality?
with respect to the C++ Language: 
there was a book published in 1996.  Large-Scale C++ Software Design by John Lakos.  He's about to publish the second edition of the book while also expanding it's reach to span two volumes.Anyhow, while we await the publication of that book, John has been working at bloomberg.  some of the code written there has been published to github[1].  He's also done a five hour lecture series [2] available on safari-online (paid service) that cover the topics of his book, and introduce the open source bloomberg repo as an example of code written in that style.I can't offer you a review as I've just found this all myself, but I'll be eagerly studying it along with some of the other items mentioned here.[1] https://github.com/bloomberg/bde
[2]https://www.safaribooksonline.com/videos/large-scale-c-livel...