I maintain a pretty high quality implementation of Hacker News.
https://github.com/tensorfork/tlarcIt has bcrypt, HN's current CSS, and so on. We use it to manage our TPUs: http://www.tensorfork.com/tpus
Improvements welcome. The nicest part is how quickly you can iterate on a webpage. The production site pulls from github every 10 seconds, and everything reloads on demand, so I can just push new code to master and see the changes instantly.
(No need to push to github just to see changes locally, of course. Every time you reload, it checks whether any loaded files have changed.)