KDE4 is another Desktop Environment based on plasma. If you haven't installed KDE during the Fedora installation process you can easily install it through yum like this:
su -c 'yum install @kde-desktop'
When the installation completes log out, click on your username and from the session manager at the bottom choose KDE. Enter your password and Log In.
Some gtk applications don't look good in KDE. To force those applications use the qt style install qtk-qt-engine.
su -c 'yum install gtk-qt-engine'
Log out and then log back in and go to System Settings -> Appearance -> GTK Styles and Fonts and select to use your KDE style in GTK Applications.
$ tar -xzf kbflags-1.0.tar.gz$ sudo cp kbflags-1.0/21x14/gr.jpg /usr/share/locale/l10n/gr/flag.jpg$ sudo cp kbflags-1.0/21x14/us.jpg /usr/share/locale/l10n/us/flag.jpg
Log out and then log back in and you should the flag in the tray. Of course you must have it enabled from System Settings -> Regional & Language -> Keyboard Layout -> Show country flag
XFCE is a lightweight Desktop Environment. It aims to be fast and lightweight, while still being visually appealing and easy to use. Xfce is not available in the traditional Fedora DVD image unlike GNOME and KDE. However it is available in the repository
You can easily install it through yum like this:
su -c 'yum groupinstall XFCE'
When the installation completes log out, click on your username and from the session manager at the bottom choose XFCE. Enter your password and Log In.