StableBit DrivePool - State of the art, file based drive pooling software.
Drive Bender - Drive Bender, class leading storage pooling technology
mergerfs - mergerfs is a union filesystem geared towards simplifing storage and management of files across...
unRAID Server - A scalable, consumer-oriented, server operating system.
OpenMediaVault - OpenMediaVault is the next generation network attached storage (NAS) solution based on Debian Linux.
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.