This is an excerpt from the 60 page independent Idealware report that provides a summary of what open source content management systems are, what features are often useful to nonprofits, and a detailed comparison of WordPress, Joomla, Drupal, and Plone, the content management systems most widely used by nonprofits. buildingcmscontentdrupaljoomlamanagementopenplonesourcesystemswebwebsitewordpress with cmscomparisonoopensource