Both Vim [1] and Emacs[2] are on the ports page [0]. In Emacs it's as easy to install as `package-install nord-theme` and then `load-theme nord`. I will note that I tried it out in Emacs running in Windows Terminal and it looks terrible, completely different from the demo and almost unusable - I quickly went back to one of the default themes, tango-dark. This is probably only going to work in the GUI version.
[0] https://www.nordtheme.com/ports
[1] https://www.nordtheme.com/ports/vim
[2] https://www.nordtheme.com/ports/emacs