Gnome and some KDE applications used to offer tear-off menus that could be positioned anywhere, similar to NeXTSTEP and its derivatives. Seemed like a neat idea that still deserves some consideration.

Designed by none other than the legendary Susan Kare, apparently.

Complete the effect by combining them with a wristwatch broadcasting your heart rate and the transfixed stare of Apple’s goggles.

It’s a paid app only available for Windows and Mac at the moment, but Fork may be worth a look: https://git-fork.com