Free Virtualization Software

Microsoft Virtual PC – free software virtualization
http://free-software.t2i.info/server-type/microsoft-virtual-pc-free-software-virtualization.html  (Virtual PC lets you create separate virtual machines on your Windows desktop)

VMware Server Virtualization – Virtual Machine
http://free-software.t2i.info/server-type/vmware-server-virtualization-virtual-machine.html  (is a hosted virtualization platform that installs like an application on any existing server hardware & partitions a physical server into multiple virtual machines. )

VirtualBox free x86 virtualization
http://free-software.t2i.info/server-type/virtualbox-free-x86-virtualization.html  ( VirtualBox is 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)