Pelican <http://getpelican.com/>; is a Python-based static site generator with a very active community behind it. It has a good mix of features without being overly complicated. Check it out!
(Disclaimer: I'm a Pelican project committer.)
(Disclaimer: I'm a Pelican project committer.)
For other devs: if you're familiar with Jinja, then you're 80% of the way there.