Rails's open source projects with best practices and/or code standard?

Question

I would like to know some of the great opensource projects in Rails with some best practices and/or code standard including unit testing, so that I can learn some experiences from building apps from those sources.

Answer 1

1. Teambox (project management software). I think Teambox is pretty big to mention it;
2. Redmine (no comments). Unit testing powered;
3. Spree (e-commerce). It uses unit testing too.

There is opensourcerails.com, but doesn't work right now.

Answer 2

I haven't reviewed the projects but this blog article covers just this topic:

http://blog.chrislowis.co.uk/2010/05/31/five-rails-apps-to-study-and-learn-from.html

Answer 3

redcar looks nice