What are some good free resources for learning Ruby on Rails?

The official Ruby on Rails Guides provide comprensive documentation for every part of Rails. These guides are maintained along with the Rails source code, so they are always up to date with the latest release of Rails.

Other resources include:

  • Ruby on Rails Tutorial by Michael Hartl is modern & thorough tutorial that covers everything from installation to building a full featured application.
  • Rails for Zombies is a free interactive course designed to teach Ruby on Rails