Drupal | Develop Site
Drupal is a content management system that lets you create and maintain different types of web sites without having to know any programming language.
It is a dynamic system that instead of storing the content in a fixed static files is intended that the text content of pages, and other settings are stored in a database and then be edited in a web environment.
Is a free program with GNU / GPL, written in PHP, developed and maintained by an active user community. Noted for the quality of their code and generated pages, respect web standards, and an emphasis on usability and consistency of the whole system.
Drupal design is especially suitable for building and managing online communities. However, its flexibility and adaptability, as well as the large number of modules available, makes it suitable for many different types of website.