StableBit DrivePool - State of the art, file based drive pooling software.
Greyhole - Greyhole is an application that uses Samba to create a storage pool of all your available hard drives, and allows you to create redundant copies of the files you store, in order to prevent data loss when part of your hardware fails.
mhddfs - The driver combines a several mount points into the single one.
EON ZFS Storage - EON ZFS Network Attached Storage
mergerfs - mergerfs is a union filesystem geared towards simplifing storage and management of files across...
Liquesce - My Project discovery's / ramblings and techie stuff I deal with by Simon Coghlan