All in one html file for campus management at Roma Tre University. Free or occupied status of each box is written on the url after each toggle and can be saved and restored. Data is sent (if possible) to a server that can store the status to make it visible to other applications.
If you decide to fork this project please keep in mind that for the use requested it has to stay in 1 file and not hosted on a remote server. It can use remote services, but always keep in mind a rollback or an exception handling if they're not reachable. And since it's only client-side, avoid using passwords or api keys. Thanks!
Demo (may be not up to date): http://www.gaetanobonofiglio.com/examples/campus.html
Working version (Last Update: 2016/05/31): Live from Dipartimento di Ingegneria @Uniroma3