Thunar
Thunar is a gtk file manager originally made for xfce
Installation
NixOS
environment.systemPackages = with pkgs; [ xfce.thunar xfce.xfconf xfce.tumbler xfce.exo ]
xfconf is needed to save settings
tumbler is needed for thumbnails
exo is needed for open terminal here to function
Home Manager
Same as above but replace environment.systemPackages with home.packages