In ExpressionEngine, the term "weblog" refers to a section of your website, so even if you don't use EE to manage a blog you'll use the weblog module. The weblog module is the most flexible and powerful system we offer, enabling you to display your content in an almost infinite variety of ways. The Weblog Module supports advanced features, like custom data fields, multiple nested categories, sticky topics, workflow, publish and expiration dates, and other features found only in high-end content management solutions. You can even have multiple weblogs on the same page to create an ezine or complex brochure site.
The Weblog Module is included free with ExpressionEngine