deck.rb presentation

TryRuby a browser-based interactive tutorial in Ruby
"Learning to Program" by Chris Pine - a beginner's programming book with lots of Ruby exercises. (earlier version online)
Why's Poignant Guide
Hackety Hack a fun way for beginners to learn Ruby.
Ruby Koans - a self-guided journey through topics in Ruby for beginners and experts alike
Test-First Teaching - click on 'Learn Ruby'
Ruby Warrior - write and refine some Ruby code to get your warrior to the top of a hazardous tower
Ruby Quiz - a guided tour through the world of possibility; use your Ruby to build simple apps, games, and solve problems
Why's Poignant Guide to Ruby - A whimsical comic book that teaches you Ruby. Legendary in the community.
Learn Ruby the Hard Way It's not actually hard. A great place to start if you're new to programming and want to learn with hands-on examples.
PDX tech workshop This are the slides from the ruby/rails workshop organized in Portland, OR by PDXtech

Rails Guides - the official how-to articles for Rails
Rails API - online documentation
Rails for Zombies - a series of videos and browser-based Rails exercises
Rails Tutorial - a tutorial that leads you through writing a Rails messaging app