Contenido is an open source content management system based on PHP and MySQL.
http://www.contenido.org/
Content Management System · Open Source
Get access to data on 28,573 websites that are Contenido Customers. We know of 17,682 live websites using Contenido and an additional 10,891 sites that used Contenido historically and 2,782 websites in the United States.
Get a list of 28,573 websites using Contenido which includes location information, hosting data, contact details, 17,682 currently live websites and 10,891 sites that used this technology previously and 2,782 websites in the United States currently using Contenido.