Mobirise is a wonderfully easy way to build a static website that looks amazing and performs well.
The most popular platform by far is WordPress. Because of it's simple configuration setup and ease of use this is the most popular blogging and content publishing platform on the Internet.
When you want to build a complex and unique content publishing website that needs to work all the time and across many different display methods, you know what you have to use don't you?
Well duh... Drupal!