Estou aprendendo Ruby. Para isso, estou lendo, com sucesso, ou seguintes manuais, nessa ordem:

Já li:
- Ruby a Partir de Outras Linguagens
- Ruby in Twenty Minutes
- Ruby Essentials
C++ vs Java vs Python vs Ruby: a first impression

Atuais:
- http://pine.fm/LearnToProgram/?Chapter=03
- http://www.rubyist.net/~slagell/ruby/index.html
- Programming Ruby The Pragmatic Programmer's Guide
- http://www.caliban.org/ruby/rubyguide.shtml - Simples e muito interessante introdução prática ao Ruby!
- http://en.wikibooks.org/wiki/Ruby_Programming/Syntax

Próximos:
- http://rubylearning.com/
- Ruby Programming
- [http://www.danielcadenas.com/2007/11/bit-of-metaprogramming.html]
- Ruby User Guide
- Poignant Guide (muito louco!)
- http://en.wikibooks.org/wiki/Ruby_programming_language

Rails:
- https://blog.udemy.com/ruby-on-rails-tutorial-learn-from-scratch/
- http://guides.rubyonrails.org/getting_started.html
- http://www.loudthinking.com/posts/29-the-rails-myths

Python:
- Dive Into Python

Diversos:
- http://blog.8thlight.com/articles/2007/10/08/micahs-general-guidelines-on-ruby-require
- http://blog.jayfields.com/2006/12/ruby-alias-method-alternative.html
- autoload como em PHP
- Rescuing from LoadError
- http://www.zenspider.com/Languages/Ruby/QuickRef.html
- http://www.khelll.com/blog/ruby/ruby-callbacks/
- http://raflabs.com/blogs/silence-is-foo/2010/08/07/ruby-idioms-what-is-the-splatunary-operator-useful-for/
- http://railstips.org/blog/archives/2006/11/18/class-and-instance-variables-in-ruby/
- http://yonkeltron.com/2010/05/13/creating-a-ruby-dsl/
- http://ola-bini.blogspot.com/2006/09/ruby-metaprogramming-techniques.html
- http://stackoverflow.com/questions/5193942/calling-a-method-of-a-ruby-singleton-without-the-reference-of-instance
- http://yugui.jp/articles/846
- case when (switch)
- multitrace