What are some alternatives?
When comparing OpenMediaVault and FreeNAS, you can also consider the following products
Rockstor - Rockstor is a free and open source NAS (Network Attached Storage) operating system.
Amahi Home Server - Amahi is a media, home and app server software known for its easy-to-use user interface. Amahi has the best media, backup and web apps for small networks.
unRAID Server - A scalable, consumer-oriented, server operating system.
Zentyal - Linux directory, domain, mail, gateway and infrastructure server for SMBs.
NAS4Free - NAS4Free is the easiest and quickest way to install an Open Source free NAS server. From home NAS to enterprise network storage, NAS4Free is trusted by thousands of installations every day.
SnapRAID - A backup program for disk arrays. It stores parity information of your data and it recovers from up to six disk failures.