I find wordpress and most CMS quite of an overkill for what they are trying to do. I mean, just to deliver some contents you have a full MySQL, php, server side applications... I'm all for static websites, unless really needed.

Personally I use Pelican, as I am comfortable with python and I love the Jinja theme engine. I've used wordpress for a while, mostly for work as customers wanted it, but it's a damn mess, and getting a host is more expansive. For a static website you can just use github =D

For more complex websites I like to use Drupal, but that is bordering with an internet app. It can make powerful stuff in a very short amount of time though.

As a wiki I found dokuwiki a good engine and it can sometimes make it a nice website builder... way more sleek than wordpress, and without any SQL involved, just plain text files.