Alfresco - Enterprise Content Management System

Alfresco is the open source alternative for Enterprise Content Management (ECM), providing Document Management, Collaboration, Records Management, Knowledge Management, Web Content Management, Image Management, Content Repository, Workflow. It supports CIFS interface to provide file system compatibility on Microsoft Windows and Unix-like operating systems.

Alfresco is a content management framework where it could act as backend to store and retrieve the content. API support is available.