I've just ran a full rails application. It creates the database etc and then allows you to browse the site.

They provide company accounts. Seems kind of nice to have a full working piece of code working within a few seconds.

I can think of stripe, facbeook or any other company that provides an api.

The only problem with a full working application is that it's easier to miss what steps should be taken.

Nifty, but this one has a higher purpose. It can run an entire project in a framework.