We are pleased to announce the immediate availability of Xen 4.2.2 for CentOS-6/x86_64. The software is delivered as a dedicated repository on Centos.org and was developed with the help of the Xen Project, the Citrix Xen open-source team, GoDaddy.com's Cloud Engineering team and Rackspace Hosting.Release NotesQuickstartMore Info
thus, Xen serves as the basis for many commercial server virtualization, desktop products as well as hardware appliances.
Examples of server products include Huawei UVP, Oracle VM and XenServer. Examples of client solutions and appliances include QubesOS, XenClient and Netscaler. Xen is also delivered with as part of most Linux distributions as well as NetBSD.