Ask HN: Large open-source Rails app examples

I’m looking for a large Rails app to reference for some design patterns. I have grow a Rails app more or less on my own and it now handles millions of requests per day. The problem is I feel like my code could be cleaner or utilize some patterns that I’m not comfortable with yet. I have read a lot of books but learn better from reading examples, but I want something more than a Blog app.

Have a look at Real World Rails: https://github.com/eliotsykes/real-world-rails