vdesk 

A Virtual Desktop System for Windows. The Virtual Desktop Manager implements multiple independent virtual desktops. comes with a sophisticated wallpaper changer that allows each of the multiple desktops to have independent wallpaper.
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IBDesk 

Nice software which enables multiple desktops in Windows. Desktop switching is done via tray popup menu or customized hot keys. Provides different display settings and separate autorun lists for each desktop. Widens workspace, increases productivity.
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Multi Screen Emulator for Windows 

MSEW allows you to create and configure up to 8 virtual screens to simplify switching between different tasks. Switching of virtual screens is performed by using the MSEW panel or by hot keys.
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