Awesome
fbrowse-tray
A file-browser through a Gtk3 tray status icon.
USAGE
usage: fbrowse-tray [options] [dir]
options:
-r : order files before directories
-d : display only directories
-T : set the path of files as tooltips
-e : get the mimetype by extension only (faster)
-i [name] : name of the status icon (default: system-file-manager)
-f [command] : command to open the files with (default: pcmanfm)
-t [command] : terminal command for "Open in terminal" (default: xterm)
-m [type] : type of menu icons (default: menu)
more: dnd, dialog, button, small-toolbar, large-toolbar
example:
fbrowse-tray -f thunar -t tilix -m dnd /my/dir