Ruby: www.ruby-lang.org

Active Record—对象关系映射放在 Rails 上: api.rubyonrails.org/files/vendor/rails/activerecord/README.html

Martin Fowler 关于 Active Record: www.martinfowler.com/eaaCatalog/activeRecord.html

SOAP4R: dev.ctor.org/soap4r

WEBrick: www.webrick.org

Builder: builder.rubyforge.org