Ruby On Rails 2.3.14, 3.1.3
Ruby on Rails, often shortened to Rails or RoR, is an open source web application framework for the Ruby programming language. It is intended to be used with an Agile development methodology that is used by web developers for rapid development.
Like many web frameworks, Rails uses the Model-View-Controller (MVC) architecture pattern to organize application programming.
Ruby on Rails includes tools that make common development tasks easier "out of the box", such as scaffolding that can automatically construct some of the models and views needed for a basic website. Also required are WEBrick, a simple ruby web server that is distributed with Ruby, and Rake, a build system, distributed as a gem. Together with Rails these tools provide a basic development environment.
Ruby on Rails relies on a web server to run it. Mongrel was generally preferred over WEBrick at the time of writing but it can also be run by Lighttpd, Abyss, Apache (either as a module - Passenger for example - or via CGI, FastCGI or mod_ruby), and many others. From 2008 onwards, the Passenger web server replaced Mongrel as the most used web server. Recently, the Unicorn web server has become a favorite of new deployments.
Since version 2.0, Ruby on Rails by default offers both HTML and XML as output formats. The latter is the facility for RESTful web services.
ValueHost 2.0 is offering Ruby on Rails hosting based on nginx+Phusion Passenger™ technology which allows to reach maximum compatibility and performance while working with latest modules.