kill button on Gnome

[oxy]

Hi,

in old fvwm2 one could create a button called kill,
you click that and click on the window you wanna kill.
Why dont create sth like that on ubuntu?

Since Unity there are several windows getting hard
to kill. They dont have a menu on themselves or on the
desktop top bar. They even dont have the
kill-minimize-maximaze (X -  []) buttons to get closed.
Last example now was with the office Impress
color replacer.

I'll create such button on my desktop.