auto hide of menu/toolbars when not focussed

anyone know of any simple/basic linux apps which do this? (e.g: web browser, text editor, terminal) REASONING:- if a window is VISIBLE but NOT FOCUSSED, its only open because I want to see info in it for REFERAL but not INTERACTION. so it's menus are a waste of valuable space. I recall the (i)amiga & (ii)mac where menus always appeared on the screen's title-bar... and (iii)NeXT's floating-tearoff menus... but latterday crossplatform mac/LINUX apps revert to "windoze" crappy ui behavior. I've always hated that :) is there any fundemental reason the world has gone this way. or is it an 'appendix' that we can surgically remove :) if these don't exist, I guess my options are (i) branching an existing text editor & web browser .. AGAINST: don't want to maintain either longterm, (ii) making patches & submitting requests to maintainers of the above any further thoughts? etc.. FYI at the minute i'm customizing 'dwm' .. motivation again being maximizing useage of screenspace e.g. asus eeepc, sony tz21.. and minimal mouse useage whilst still being [i]intuitive[/i]. my reasoning is further driven by the idea many apps implement custon ui behaviour that the WM should be able to replace (e.g. photoshop has dynamic tabbing of toolbars, visual studio has very good tiled window management but ('fluxbox'+'dwm') would be superior because that behaviour is automatically available to all apps). seems to me for the 'bazaar' model of software to work, if any single app is too complex, one must find ways of dividing it up & simplifying :).

Subsequently discovered KDE does it. nice. Mac got it right. Amiga got it right. NeXT got it right, Windows does it wrong probably because Jobs' had a patent and Bill had to defeat Jobs? The windows method is an "apendix" which we have an opportunity to surgically remove in linux? Seems important to me - linux's main commercial ('widespread') value at the minute is those beautiful low-lost miniature laptops. Tiny screens, yet still a lot bigger than the ones that inspired me to want to program.