StableBit DrivePool - State of the art, file based drive pooling software.
btrfs - Btrfs is a modern copy on write (CoW) filesystem for Linux aimed at implementing advanced features...
mhddfs - The driver combines a several mount points into the single one.
mergerfs - mergerfs is a union filesystem geared towards simplifing storage and management of files across...
TrueNAS Core - TrueNAS Core (formerly FreeNAS) is a storage operating system strong and robust enough to meet the needs of enterprise level businesses.
EON ZFS Storage - EON ZFS Network Attached Storage