[SimHacker]

X11 was pushed out the door too early, because some companies were threatening to standardize on X10, and they sure didn't want that to happen.

I attended the first X11 conference, and used X10 to develop pie menus and a window manager (based on UWM) that was extensible in Forth. http://donhopkins.com/home/movies/X10PieMenuWM.mov http://donhopkins.com/home/archive/piemenu/uwm/fuwm-main.f