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.
Nimbus Platform is an integrated set of tools that deliver the power and versatility of infrastructure clouds to scientific users. Nimbus Platform allows you to combine Nimbus, OpenStack, Amazon, and other clouds. Nimbus Infrastructure is an open source EC2/S3-compatible Infrastructure-as-a-Service implementation specifically targeting features of interest to the scientific community such as support for proxy credentials, batch schedulers, best-effort allocations and others.