JBake is a Java based, open source, static site/blog generator for developers & designersDownload
Source available on GitHub, licensed under MIT License
The binary distribution runs on Windows, Unix/Linux and Mac OS X.
Structure your content any way you see fit.
RSS feed, archive and tag support.
View your draft content before publishing it and making it available to the world.
Binary distribution contains everything you need apart from a JRE, no complicated environment setup with 3rd party dependencies.
Add as much metadata to content as you like, also exposed to templates.
Store your site content in Dropbox, CVS, SVN, Git or whatever you want.