I've been using Stacey for that purpose. It doesn't exactly export HTML but the surface area of attack is very reduced as it doesn't interact too much with the outside world: http://www.staceyapp.com/
1) reordering posts -- posts are displayed in _alphabetical_ order, as are directories, so the suggested nomenclature is a numerical prefix before every file name. So if I wanted to rearrange things, I had to decide whether not a linear shift was worth the benefits of file name readability.
2) the order of posts is reversed! I want new blog posts to show up at the top of my feed, but Stacey puts higher numbers underneath. I didn't want to count backwards, so I looked around and found a php hack for reversing this.
This might be fun if you're hankering for some DIY PHP, but I wouldn't recommend it otherwise.
https://github.com/kolber/stacey/wiki/Templating-Language#fi...
It's not like you're forcing them to build jekyll.