Xen and Other Hypervisor

Here is a Hypervisor open source project,

      http://kenai.com/projects/hypervisor/sources

Xen Project,

     http://www.cl.cam.ac.uk/research/srg/netos/xen/

Zero-Copy

Zero Copy is a very sexy concept in the distributed data storage systems.

More details,

     http://en.wikipedia.org/wiki/Zero-copy