Sun xVM VirtualBox

The Sun xVM VirtualBox Open Source Software works as advertised. Below are screen-scrapes of

1. Windows PC running Ubuntu in a VirtualBox
   
2. Ubuntu laptop running XP in a VirtualBox
   
3. Ubuntu AMD 64 PC running OpenSolaris in a VirtualBox
   
4. Ubuntu AMD 64 PC running Windows XP in a VirtualBox
   

VirtualBox is the only free personal/SMB virtualization product that runs on all the major computing platforms - Windows, Linux, Mac, and Solaris.