CRoomCal is a scheduling display app for conference rooms or other shared resources.
It is intended to be a constantly on public display that can be placed close to the conference room so everyone can see what is scheduled to happen in that room now and in the future.
Also, rudimentary booking of the resource can be done with the app.
CRoomCal uses the iOS calendar to fetch the information, which means it should work with and calendar that can typically be synched to iOS. Such as Gmail, Google Apps, Microsoft online, Office 365 or your own Exchange server and so on.
The free version is ad supported, but an in app purchase allows you to remove the ads.