This is a small django app that lets you define sets of urls with timeouts, so they can be "narrowcasted" to browsers.
It's possible to define several sets called shows. URL's can be arbitrary urls, in that they don't need to be served by your Django project, but they can live anywhere on the web (or on your intranet). Narrowcaster will fetch the documents and serve them to the clients.
We use it to serve webpages to a big screen using the kiosk mode of the chrome browser:
google-chrome --kiosk <url of narrowcaster show>