The Scrivito example application is a ready-to-use Rails application. It is almost identical to the Scrivito demo which you can launch via your account settings.
When setting up the Scrivito Example App you can choose to load the same contents as seen in the Scrivito demo, via the Rails runner. Or use the app without the content and create your own. Follow the instructions in the readme to get started.
The Scrivito example app showcases several widgets for everyday use and also features more advanced functionality, e.g. a blog and a search. It uses the plain Bootstrap 3 CSS framework.