A modern alternative to BGInfo.
Runs as a Windows system tray icon. Displays information as a toast notification. Crucially, does not mess with Windows background.
In a modern world of mobile devices and external screens, BGinfo's approach means threads like this end up describing half the endpoints.
I'll add that nearly every BGInfo user has to write a VBScript to produce pretty much the same set of information as everyone else.
This app lives in the Windows systray, and can be clicked to produce a toast message of exactly what is required.