Ruby on Rails
Abbreviated as RoR, Ruby on Rails (also referred to as just Rails) is an open source Web application framework, written in Ruby (object-oriented programming language), for developing database-backed Web applications. RoR closely follows the Model-View-Control (MVC) pattern, where models, views and controllers are fully integrated in a seamless fashion. Rails is a pure Ruby development environment that allows for real-world applications to be developed in less code and with a minimum of configuration.
Ruby on Rails was created by David Heinemeier Hansson, a partner at 37signals, then extended and improved upon by a core team and hundreds of open-source contributors. Rails is released under the MIT license. Ruby is available under the Ruby License.