I use Hammerspoon and Karabiner Elements on macOS to rebind keys (including the examples you gave). There's some examples and repositories available for these a

I use Hammerspoon and Karabiner Elements on macOS to rebind keys (including the examples you gave). There's some examples and repositories available for these applications. On Windows, I use AutoHotKey, though mainly for gaming (be aware it can get you banned on some games though; investigate this beforehand). On Linux, I have a bit more difficulty with all of this because: 1) There's no standard application or configuration or even desktop. As of now I mainly use Gnome, but my preference would be to use more lightweight WM/DE on some of my devices. 2) I sometimes use a Linux desktop in a VM, from macOS.