Drupal

Kevin Norwood writes (on 2007-01-30):

I would like to nominate Drupal for FLOSS. I do like what they have
done, and what they are doing for the future. I am using the product on
my web site currently, and they do make it fairly easy to setup and
administer the site.

Here is Drupal's contributions page: http://drupal.org/contribute/donations