WiseDesktop is an award-winning virtual desktop manager for
Windows with user-friendly interface and useful features.
WiseDesktop creates four virtual desktops and only one is
visible at a time. So, when you switch desktops, all visible
application windows just disappear from the screen and from
the Windows taskbar. It is possible to quickly change the
"active" desktop by using keyboard hotkey, system tray icon
or WiseDesktop deskband. It is fast, stable and easy to use.

Also you can set custom wallpapers for each desktop, move
application windows from one desktop to another by
drag'n'drop, keep an application window on all desktops,
close an application window from the WiseDesktop main
window, change the order of applications on the Windows
taskbar etc.