• WordPress 34.7%

• Drupal 25.3%

• Joomla! 11.1%

• MediaWiki 10.5%

• Other 10%*

• Alfresco 4.3%

• WebGUI 1.3%

• ikiwiki 1.1%

• eZ publish .7%

• Wolf CMS .4%

• Elgg .3%

• Blosxom .2%

*Under "Other", the most popular write-ins were (in this order) DokuWiki, Plone, Django and Typo3.