Emcee
Master the ceremony of maintaining and updating (software) systems. Let interested parties know before, during and after the maintenance. That is Emcee.
Emcee was a startup experiment and has been discontinued.
The ideas behind Emcee are simple: if you manage (software) systems that require maintenance, let the users of these systems know.
Let them know about the upcoming maintenance events in a manner that is structured, standardized, recognizable, and easy to use.
Emcee is software as a service, but has been discontinued and is no longer available on the web.