Cool KDE Plasma Tip: Quickly access task manager apps with [Meta] + [number]
@kde's task manager usually lives in the panel located by default at the bottom of your desktop (see attached image).
Quickly open or display apps shown in the task manager by holding down the [Meta] (aka "Windows") key and hitting one of the number keys at the top of your keyboard.
Reach the first app on the left with [Meta] + [1], the second from the left with [Meta] + [2], etc.
@diazona@Bro666@rriemann@kde@kde there are still updates of the source code. There is a PPA for Ubuntu, but that hasn't been updated for a while. It is fairly easy to compile.