Introduce to Wordpress, Drupal, and Dreamweaver

Dreamweaver can be used to create all three types of sites -- you could build a Drupal site in Dreamweaver or a WordPress site in Dreamweaver. In another word: Dreamweaver is able to design many types of web sites by straight code.
Drupal is a free and open-source content management framework (CMF) written in PHP and distributed under the GNU General Public License. Its force on management and business collaboration by offers lots of plugins and extensions like a blog, calendar, and forum. Drupal would be a good choice for you, if you need to managing the content and don't know any HTML.
WordPress is a popular blogging tool, it is free and open source, Features include a plug-in architecture and a template system. Many people are using it to manage their entire site, because the build-in plugs functions are good for people who dont know code and dont mind of their sites look like blogs.
Finally, for professional web designers, developers, they like to using Dreamweaver to create many type of site they want without any limitation. Dreamweaver doesn't have the built-in tools for blogging or CMS, so designers and developers like un-limitation to build and maintain templates for Drupal or WordPress sites.