Just in case you missed it, XenServer is now open source.
It’s confirmed by the Citrix CTO of Virtualization and Management division Simon Crosby, who answered a question about this topic on virtualization.info.
Citrix XenServer is a commercial implementation of the Xen open source hypervisor, as much as Oracle VM Server and Novell SUSE Enterprise Linux Xen.
XenSource, the company which sponsored the Xen project in its early days and that developed XenServer, has been acquired by Citrix in August 2007 for $500M.
Citrix first decided to give away XenServer for free (February 2009) and then announced its plan to release it as open source (October 2009).
The source code is now part of the XenServer 5.5 Update 2 download package that is available online.
To see the source code ISOs you have to log on:





