Nice Ruby Reference

This site provides a references for many rdocs in one place

http://www.noobkit.com/

Covers:

ActionMailer 1.3.3
ActionPack 1.13.3
ActionWebService 1.2.3
ActiveRecord 1.15.3
ActiveSupport 1.4.2
Daemons 1.0.6
Ferret 0.11.4
Hpricot 0.6
net-ssh 1.1.2
pdf-writer 1.1.3
Rails 1.2.3
Rake 0.7.3
RedCloth 3.0.4
RFacebook 0.6.2
Rio 0.4.0
RSpec 1.0.5
Ruby 1.8.6
Syntax 1.0.0