nnn/misc/nlaunch/README.md

nlaunch is an independent POSIX-compliant GUI application launcher shell script. To use it with nnn you need to mark the file executable and drop it somewhere in your $PATH.

It requires fzy to show a fuzzy drop-down menu.

To use nlaunch as an independent launcher add a keybind to open nlaunch in a terminal e.g.

xfce4-terminal -e nlaunch