Run one operating system inside another with VirtualBox

VirtualBox is a freeware application that lets you run one operating system inside another. For instance, you are using Linux but sometimes you want to switch your operating system to Windows you can load up VirtualBox and run Windows easily without any problems.

Sun just released the new version of VirtualBox with major update that improved performance, it supports VHD disk images created using Microsoft Virtual PC. VirtualDisk 2.0 also adds support for the Ubuntu 8.10 and Fedora 9 Linux distributions.  Download VirtualDisk here