Here is a list of a few awesome sites offering tools for learning Rails:
I bought my first PeepCode screencast back in 2008, before Rails and Merb merged. It’s been around for a while, but Geoffrey Grosenbach does a great job of keeping it up-to-date. There are now a number of screencasts about current topics of interest to the Ruby on Rails community, including Rails 3, Backbone.js, PostgreSQL, CoffeeScript, and John Barnette.
Pricing: Free weekly episodes, additional weekly episodes and revised episodes for $9/mo (RailsCasts Pro); Twitter: @railscasts
Railscasts is great for keeping up on Ruby On Rails, and because it’s free, it’s also great for recommending to people who are curious about Rails but not ready to spend money to help them learn it. Ryan Bates is great at explaining things. He covers a wide variety of topics in his screencasts and presents them in a nice format with code snippets.
Update: since I posted this Ryan Bates released Railscasts Pro, which is fantastic!
Pricing: $26 (book), $85 (screencasts), $95 (both); Twitter: @railstutorial
Michael Hartl is a physicist who does a number of other things (see his about page) including Web Development with Ruby On Rails. I’ve watched all of his screencasts; they’re fantastic. He builds a web application TDD-style and teaches many different concepts including MVC and how TDD can help with authorization (which is trickier than authentication IMO).
Pricing: Free; Twitter: @rails_apps
I always thought that the Rails Starter App templates were cool, but they were missing something: in-depth tutorials and a comparison between the many different templates and quick-start tools. Daniel Kehoe has provided both and many more useful resources in his Rails Apps GitHub account.
Pricing: Free (one substantial free product), $45-55 (single paid products); Twitter: @codeschool
Code School is a set of tutorials designed to help developers to quickly get up to speed building web applications. Gregg Pollack and Envy Labs have been doing podcasts and screencasts for quite some time, and it’s not surprising that they still do it, because they’re very enthusiastic in front of a camera and a microphone.