DryDrop updates App Engine site after pushing to GitHub: "DryDrop is a tool that lets you host your static site on Google App Engine and update it by pushing to GitHub. Thanks to GitHub post-receive hooks your App Engine site can be updated automatically when you push new content.
DRY principle (set it and forget it)
Zero cost (thanks to Google App Engine)
Zero maintenance (thanks to GitHub)
No Python knowledge needed, but you need to know the basics of Git"