Which desktop environments let you switch to a non-default window manager

desktop-environmentsoftware-recwindow-manager

I used to use fvwm as the window manager under Gnome 2, but as I understand Gnome 3 can't be used with a non-default window manager, so I'm looking for alternatives. Are there other desktop environments that have the option of switching to a different window manager?

What I know so far:
Mate presumably does, since it's a Gnome 2 fork
LXDE does (source)
Razor-qt does (source), but it seems pretty early in development

Information from answers/comments:
– Xfce does
– KDE does
– I may be able to use the Gnome tools I want without running Gnome Shell

I'm still not sure about the Gnome3 Fallback mode, and I'm probably missing other options.

Best Answer

Xfce allows to use custom wm. LXDE is set of Openbox (wm) and panel, menu, etc, so it obviously allows. If you like Gnome2, you probably should try Mate, though I can't recommend it because I heard that it is buggy. Why don't use clean wm? Just install applications you need from gnome2 and use them. If you need panel, there are a lot of alternatives like tint2.

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