Xen: Virtual Machines

What is Xen Hypervisor?

The Xen hypervisor is a layer of software running directly on computer hardware replacing the operating system thereby allowing the computer hardware to run multiple guest operating systems concurrently. Support for x86, x86-64, Itanium, Power PC, and ARM processors allow the Xen hypervisor to run on a wide variety of computing devices and currently supports Linux, NetBSD,
FreeBSD, Solaris, Windows, and other common operating systems as guests running on the hypervisor.
The Xen.org community develops and maintains the Xen hypervisor as a free solution licensed under the GNU General Public License.

http://www.xen.org


http://www.xen.org/files/Marketing/WhatisXen.pdf

http://www.xen.org/community/xenhistory.html

• Xen at Wikipedia - http://en.wikipedia.org/wiki/Xen
• Xen Overview (In Process) - http://wiki.xensource.com/xenwiki/XenOverview
• Virtualization at Wikipedia - http://en.wikipedia.org/wiki/Virtualization
• Xen Dom0 Kernels - http://wiki.xensource.com/xenwiki/XenDom0Kernels
• Xen FAQ - http://wiki.xensource.com/xenwiki/XenFaq
• Xen Case Studies - http://wiki.xensource.com/xenwiki/Xen_Case_Studies
• Xen Books = http://wiki.xensource.com/xenwiki/Books?highlight=%28books%29
• For Developers 
• The Definitive Guide to the Xen Hypervisor
• For Users
• The Book of Xen
• Running Xen: A Hands-on Guide to the Art of Virtualization

Update: Notes from SVLUG Meeting  Xen.org Stefano Stabellini Developer