Looking for a plugin to place a system-wide announcement within the web and mobile application for all users. For example, letting all active users know that we will be conducting maintenance in the next 15 minutes. Essentially a warning or broadcast message that will appear as a banner across the top of the page for every user.
I remember seeing some vendors selling plugins like this at SugarCon, but my Google-Fu is failing me. I can't find any of them now.