I originally designed and built Statixite as a service but decided to release it as an open source project. It works with Jekyll[1] sites, but with the hopes to support other generators. The main goals were to include the ability to manage multiple sites, manage posts with a markdown editor, and simplify the deployment process. Feel free to hack away at the demo[2].
I've packaged it as a Ruby gem on Github[3]. It's basically a Rails Engine that can be mounted on any Rails project.
[1]: http://jekyllrb.com
[2]: https://app.statixite.com/users/sign_in?demo=true
[3]: https://github.com/rlafranchi/statixite