The Xen Project allows vendors to advertise services and software that use Xen and/or build on top of Xen to advertise their services and/or software in the Xen Project Directory. For more information read the vendor notes.
Domain Technologie Control (DTC)
DTC can take care of the management of your VMs. It also does Network and CPU graphing for all your VMs and allow your users to connect to it's VMs physical consoles over ssh (LGPL)