Overview of NAS Operation Systems

• CryptoNAS (http://cryptonas.org/) - Free
• EON (http://sites.google.com/site/eonstorage/, Blog http://eonstorage.blogspot.com/) - Free
• EuroNAS (http://euronas.de/web/index.php) - Commercial
• FreeNAS (http://www.freenas.org/) - Free
• Napp-it (http://www.napp-it.org/) - Free
• NASLite (http://www.serverelements.com/naslite.php) - Commercial
• NexentaStor (http://www.nexenta.com/) - Commercial (Developer Edition is restricted to 4TB)
• Open-E (http://www.open-e.com/) - Commercial (Lite Version is restricted to 2TB)
• OpenFiler (http://www.openfiler.com/) - Free (Commercial support is available)
• PulsarOS (http://pulsaros.digitalplayground.at/) - Free (?), not released yet
• UnRAID (http://www.lime-technology.com) - Commercial (Basic Version is restricted to 3 Drives)

Do you have any experiences with one of those?