> What's the best static site generator that meets the following requirements: a) Doesn't use node.js.

So even if a node.js solution would be the best solution, you would still not want to use it? Why?

Anyway, I'd recommend to write a static site generator yourself. It isn't very difficult, you get exactly what you need, and you never get stuck because someone abandoned their project or doesn't want to fix the bugs you reported.