Rails 3 has released with various notable features and said that it’s one of the best version rails community has released so far.

Highlights of major features:

1. Brand new router with an emphasis on RESTful declarations

2. New Action Mailer API modeled after Action Controller

3. New Active Record chainable query language built on top of relational algebra

4. Unobtrusive JavaScript helpers with drivers for Prototype, jQuery, and more coming (end of inline JS)

5. Explicit dependency management with Bundler