PCLinuxOS

VirtualBox is a powerful x86 and AMD64/Intel64 virtualization product for enterprise as well as home use. Not only is VirtualBox an extremely feature rich, high performance product for enterprise customers, it is also the only professional solution that is freely available as Open Source Software under the terms of the GNU General Public License (GPL).

Virtualbox allows you to run multiple operating systems right from your existing PCLinuxOS desktop without the need to reboot to run the other operating system.  Virtualbox is a great way to test  Linux distributions without wasting a CDR  or run those can’t do without applications from Windows within Virtualbox.