Concrete5 - Free CMS | Open Source Content Management System. Drupal and Joomla to Lose Market Share to concrete5 Web CMS? If you were to believe all the hype surrounding concrete5, an open source Web content management system, then a remarkable new system has just gone on General Availability (GA).
While its usually a good idea to give every company a hearing and every piece of software a trial run, generally PR emanating from a company about their own product should be taken with even the tiniest pinch of salt. Especially when they are claiming to be better than Drupal and Joomla, two of the most well known open source web content management systems. Joomla! Blog Tool and Publishing Platform. Welcome to | django CMS. Drupal.org | Community plumbing.