Kingpin is an open source platform as a service. It's pretty great, and also not nearly done.

$ pin create awesome
Creating application "awesome"... done.
Added git remote "kingpin".

$ git push kingpin master
Counting objects: 69, done
Delta compression using up to 4 theads.
Compressing objects: 100% (52/52), done.
Writing objects: 100% (69/69), 95.53 KiB, done.
Total 69 (delta 5), reused 0 (delta 0)

Deploying Ruby on Rails application to /srv/apps/awesome.

Installing dependencies...
  $ bundle install --deployment
  > Fetching source index for http://rubygems.org/
  > Installing rake (0.8.7)
  > ...
  > Installing rails (3.1)

Exporting processes...
  $ foreman export upstart /etc/init/awesome
  > [foreman export] writing: /etc/init/awesome.conf
  > [foreman export] writing: /etc/init/awesome-web.conf
  > [foreman export] writing: /etc/init/awesome-web-1.conf
  > [foreman export] writing: /etc/init/awesome-worker.conf
  > [foreman export] writing: /etc/init/awesome-worker-1.conf

Deployment complete.

• Fork the repository.
• Do your thing.
• Open a pull request.
• Receive cake.

... nuh-uh, it's not ready yet.