A list of projects for learning about the Ruby language.
CodeAcademy - See a pattern here? :)
Try Ruby - A nice, 15 minute introduction to Ruby. Runs in the browser.
"Why’s (Poignant) Guide to Ruby" - Solid, unusual introduction to Ruby and programming
Learn Ruby the Hard Way - Solid, if repetitive, introduction to Ruby.
Wikibooks, Ruby Programming - Handy overview with a collection of related resources.
Ruby Monk - Bite-sized Ruby tutorials.
Rails for Zombies - Learn Ruby on Rails with the aid of helpful Zombies.