Symphony is a web-based content management framework (CMF) that enables users to create and manage websites and web applications of all shapes and sizes -- from the simplest of blogs to news sites and social networks.
Symphony is open source software, built with PHP, that combines a flexible, open architecture with XSLT to give users control over data structures, field types, parameters, templates, events and extensions that allows flexible and efficient development of many types of sites.
The code is available as a ZIP download from the Symphony community site or as a Git repository from the official Symphony GitHub repository.