The Xfce 4 Panel supports multiple panels, with many options
for their position, appearance, transparency and behavior.
There are many items available by default to full fit a panel,
like application launchers with detachable menus, a graphical pager,
a tasklist, a clock, a system tray, a show/hide desktop switcher,
and even more. It offers an easy way to add items using a dialog,
and to move items accross different panels.