Here you can always download the current version of the open source CMS Contenido. User guides and Version 4.6.24 of the Content Management System are also available here.
Or download the latest stable version of CONTENIDO:
At Sourceforge you can download alpha-/beta- and older versions of Contenido, as well as the XAMPP-versions installable under Windows. The XAMPP-versions are very well suitable for testing Contenido in a local environment.