Mysite is a project mainly written in JAVASCRIPT and RUBY, it's free.
mysite at www.kentarok.org
My website: http://www.kentarok.org/
See http://code.google.com/p/appengine-jruby/wiki/GettingStarted
$ cd /path/to/www.kentarok.org
$ appcfg.rb update .Put garbages under public/ dir.