Hardware, great electro/new wave soundtrack ...
The Keep, great Tangerine Dream soundtrack ... by the way, Sorcerer is getting rereleased, if you like a vintage Tangerine Dream soundtrack to a great movie.
I don't remember the Return of the Living dead soundtrack too well, will have to rewatch that one.
Day of the Dead, great soundtrack, I made a song tribute to Day of the Dead using elements of its soundtrack, you might enjoy it, it's called
Darkest Day of Horror, free high quality mp3 download there.