Ruby
String#classify - Create a class name from a table name like Rails does for table names to models
RDDB - RESTful ruby document-oriented database
JRuby
An introduction to JRuby
Rails
How to upgrade your RESTful routes to Rails 2.0
Sending mail with Rails
Rails Plugins
auto_complete - add auto complete to a input field
restful_open_id_authentication - provides both OpenID based authentication AND regular [...]