Here's a small, shameless, open source, plug: I work on the "Cactus" static website generator, check out and fork our work here: github.com/koenbok/Cactus (current version), https://github.com/krallin/Cactus (next version)
It's got more tests, and it succeeds at building the Cactus examples like the old one. The only thing that's not stable in it is the "serve" mode.
I'm working with Koen (the original author) to get this into the main repo.
--- If you use it, and run into any issue, get in touch with me: thomas [at] orozco.fr