http://docs.xfce.org/xfce/xfwm4/wmtweaks shows a typical view...
It's title bar is just "Window Manager Tweaks".

No wonder few can tell if this is X-windows, Openbox, XFCE or whatever.

Therefore all windows need to add branding:
e.g., "XFCE Window Manager Tweaks".

(We are talking about XFCE I hope!)