Smashing is a Sinatra based framework, used to build beautiful and impressive dashboards. The project is a fork of Dashing, an excellent framework created by Shopify for displaying custom dashboards on TVs around their offices.
Smashing has a drag & drop interface for re-arranging the widgets positions and many premade widgest, ready to be used. Developers can also build custom widgets, to display data from multiple sources (Simple Ruby DSL for fetching data from databases or online resources).
The official Smashing page is here →.
Here is a live demo → of a simple dashboard with realtime update. You can host your Smashing dashboards on Heroku in less than 30 seconds.