"Popular open source software such as Drupal, Joomla!, and Plone are provided for free, but the greatest advantage comes in the form of increased flexibility and total control over customization of the product. This allows you to develop a more tailored solution for your organization's needs. But there's a catch: You have to know what you're doing.
"While these types of open source solutions are a great choice for organizations that have highly technical staff or the financial means to hire outside developers, organizations with little in-house IT resources might find the learning curve too steep and the lack or “formal” support a bit disconcerting."
