ReSTX is a project mainly written in Python, it's free.
Streamlined site publishing for reST docs
Hacking around a proof-of-concept, and now refactoring into a reusable module.
reSTX is an offline tool for publishing flat websites. It recursively parses restructured text files in a directory tree, creating html in each directory. Sites may therefore be written and updated using reST, which is a fast and less distracting way to author content.