Drupal is my Content Management System of choice. A very dense platform for everything from blogging to storefronts to commercial sites to grassroots campaigns. It has a very active development community, pristine code and programming interfaces, and very few security problems. Drupal is released under the GNU Public License.
Just about every web site I’ve done since 2002, including this one, has been Drupal-based.
I contribute back to the codebase every so often, and am the author of the freelinking.module and prepopulate.module.
