FreeNAS is a free, open source NAS operating system which has many features (beyond being a Network Attached Storage Device).

Based on the FreeBSD operating system, it’s a product which has been out for many years (since 2005 ish) I started using it in about 2008.

iXSystems (the supporters of FreeNAS) have recently released an update which includes quite a few changes, including:

• Improved user interface, hiding advanced options which could confuse new users
• Server 2012 Clustering and Offloaded data transfers
• ZFS Boot device
• WebDAV file sharing
• Many More…

There’s a video demonstrating a load of these improvements on their website here. Or alternatively jump right in and Download FreeNAS