AOE is a low overhead, non-routable storage protocol developed by Coraid.

http://www.coraid.com/

Coraid has a full line of storage products for SAN and virtualization projects.

Starwind also offers products and services with AOE support.

• http://www.starwindsoftware.com/

The AOE protocol is open source and is widely included in various Linux distributions.

There is Windows driver support as well:

• http://winaoe.org/