Symfony is an Open Source PHP Web applications development framework.
It was originally conceived by the interactive agency SensioLabs for the
development of web sites for its own customers. Symfony was published by
the agency in 2005 under MIT Open Source license and today it is among the
leading frameworks available for PHP development.
Supported by SensioLabs - but also by a large community - Symfony has many resources: plentiful documentation, community support (mailing lists, IRC, etc.), professional support (consulting, training, etc.), and so on.
Available in version 2.0, Symfony already has, among the hundreds of sites and applications developed on its platform, prestigious references, such as Yahoo!, Dailymotion, Opensky.com, Exercise.com, phpBB, or Drupal.
Symfony is entirely free and published under the MIT license.
Since 1998, SensioLabs has been promoting the Open-Source software movement by providing quality web application development, training, consulting. SensioLabs also supports several large Open-Source projects.