Other Desktop Environments (New Wiki Entry)
Downloadable Whonix versions come with KDE installed by default. It is possible to uninstall KDE, although doing so is a bit difficult, especially if you want to uninstall all of it and/or to to use a CLI version and/or to install their own desktop environment such as Gnome, LXDE, etc.
Users who build Whonix from source code using Dev/Build Documentation can use optional Terminal-Only build configuration option. And then decide from there.