Dashing is a mature dashboard framework, based on Sinatra, used to build very beautiful dashboards. It's frequently used to display dashboards on TV screens in offices.

Here are the main features:

• use premade widgets, or fully create your own with scss, html, and coffeescript
• widgets harness the power of data bindings to keep things simple. Powered by batman.js
• use the API to push data to your dashboards, or make use of a simple ruby DSL for fetching data
• drag & Drop interface for re-arranging your widgets
• host your dashboards on Heroku in less than 30 seconds

The project was created at Shopify for displaying custom dashboards on TV screens.

Example 1 link - Example 2 (TV screen) link

More information on the project website.