CMSMS
CMSMS
http://www.cmsms.com/
Drupal
Drupal
http://www.drupal.org/
Flatpress
Flatpress
http://flatpress.org/
Grav
Grav
http://getgrav.org/
Guppy
Guppy
http://www.freeguppy.org/?lng=en
Joomla
Joomla
http://www.joomla.nl/
Magento
Magento
http://www.magentocommerce.com/
Monstra
Monstra
http://monstra.org/
Nanomus
Nanomus
http://www.php-nanomus.org/
Pico
Pico
http://picocms.org/
Templeet
Templeet
http://templeet.org/
Ubercart
Ubercart
http://www.ubercart.org/
Webiva
Webiva
http://webiva.org/
Wolf
Wolf
http://www.wolfcms.org/
Wordpress (tip!)
Wordpress (tip!)
http://www.wordpress.org/
Zen-Cart
Zen-Cart
http://www.zen-cart.nl/