"Smashing, the spiritual successor to Dashing, is a Sinatra based framework that lets you build excellent dashboards. It looks especially great on TVs."
dashing is a pretty stable product. Its like a simple framework you can customise anything you need in it. We used it in our team to serve alarm metrics till it was deprecated in favour of Grafana.
Grafana is a push model, while Dashing is a pull model.
Grafana is pretty tough on RAM and svg usage. Try to use pngs and the UI is harder to adopt.