1) Microsoft Powertoys for xp
http://www.microsoft.com/windowsxp/d...powertoys.mspx

2) Dexpot virtual desktop
http://www.dexpot.de/en/index2.html

3) Open source virtual desktop
http://virtual-desktop.sourceforge.net/

4) Desktop manager
http://www3.nf.sympatico.ca/byronm/dm.html