StableBit DrivePool - State of the art, file based drive pooling software.
OpenMediaVault - OpenMediaVault is the next generation network attached storage (NAS) solution based on Debian Linux.
Drive Bender - Drive Bender, class leading storage pooling technology
TrueNAS Core - TrueNAS Core (formerly FreeNAS) is a storage operating system strong and robust enough to meet the needs of enterprise level businesses.
mhddfs - The driver combines a several mount points into the single one.
SnapRAID - A backup program for disk arrays. It stores parity information of your data and it recovers from up to six disk failures.