ConVirt

From the ConVirt documentation:

"ConVirt is a powerful virtualization management platform for administering and automating your Xen infrastructure. Use ConVirt if you need centralized management; if you need high availability, backup & restore, and workload management; if you need self-service for your customers; or if you want to manage your virtualization infrastructure from a "single pane of glass"."

STATUS

• ConVirt 2.5 is Open Source. It can be installed locally or as a pre-built VM image from the Convirture website.
• ConVirt currently integrates with xm/xend. Support for xl/libxenlight and/or libvirt is on their roadmap.
• Integration logic is a little stale, apparently with the last explicitly supported version of Xen Project software being 3.2. You may need to manually do a few tasks to integrate with your 4.* installation.

DOCUMENTATION

• ConVirt for Xen Project write-up and Webinar from the Convirture website