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…