Content Management Systems

The delinations between types opf software programs are blurring more each day.

Here’s a link to Wikipedia’s definition of content management systems.

Blog programs such as WordPress can be used as a CMS.

Blogging modules now exist for CMS programs that were not originally designed for blogging.

Photo gallery software that was once stand-alone has been modularized for use within blogging and CMS programs.

CMS programs are open source, others not.

Here is a very short list of open source programs:
OpenCMS
Joomla
WordPress
Bitweaver
Drupal

And here’s a short list of commercial CMS programs:
Subdreamer CMS
PHPCow
Bitrix Site Manager