Comparison of virtual machines

==Basic general information about the virtual machine packages: creator, guest systems supported, license, etc.==

Note: these are all Virtual Machines in the hypervisor or hardware emulator sense. None of them are VMs in the same sense as the .

* - Requires patches/recompiling ** - Native speed because nothing is running under emulation or any different as it would natively without being under a VM. The only speed decrease noticed is only because the OS service is being pooled with the other OS services. Xen functions more like a really advanced and lower level chroot.