"Ruby on Rails" or "ROR"is an open source web application framework for the Ruby programming language. It is often referred to as 'Rails' or 'RoR'. It is intended to be used with the Agile development methodology, which is often utilized by web developers for its suitability for short, client-driven projects.

Rails works with Ruby 1.8.4, Ruby 1.8.5, and Ruby 1.8.6. It also works with Ruby 1.8.2 but not the 1.8.3 version. Currently Rails public stable release is 2.0.2, and it is available by Gem download

Rails is a full-stack framework for developing database-backed web applications according to the Model-View-Control pattern. From the Ajax in the view, to the request and response in the controller, to the domain model wrapping the database, Rails gives you a pure-Ruby development environment. To go live, all you need to add is a database and a web server.