Trailblazer is a high-level Architecture libraries for the Ruby web application (not only for Rails). If you are no familiar with it yet - take a 20 minutes walk through guide...
I want to cover once again those places where our team had issues or misunderstanding. Trailblazer documentation got a lot of improvements recently and keep getting more and more care. Some points from this list are covered by the docs, but in practice not everything was smooth.
Disque - a DIStributed QUEue from Redis author. Usually people use "Redis as a jobs queue" with only onse single Redis data type. So it seems to appear as a higly efficient, self-contained solution!
How to replace Capistrano deploys with Ansible. Good example implementation by Bedrock. Provision (dev and prod), deploy and rollback steps.
PHP Performance and Scaling videos curated by Erika Heidi
ruby-toolbox.com - a great categorized collection of Ruby gems with popularity rating. Thta's what I need right now! :)
fasterer - will suggest some speed improvements in Ruby application according to fast-ruby recommendations