To me, DEs are out, if a window manager has its keybindings convoluted (read openbox), is out. I cannot waste time going to menus and clicking. Not to mention the RAM waste, thus, speed is where is at; looks mean nothing to me.
JWM, Icewm, and Ratpoison.
xfe -file manager
mirage -image viewer
nano -word processor (save everything in .txt)
scrot -take snapshots
flburn - burn isos (small and simple)
xdgmenumaker - includes menus for JWM, menumaker does not.
Desktop Celeron with 4 gigs RAM - IceWM
KISS - Keep It Simple, Stupid