StableBit DrivePool - State of the art, file based drive pooling software.
VMware vSAN - VMware vSAN is radically simple, enterprise-class software-defined storage powering VMware hyper-converged infrastructure.
Drive Bender - Drive Bender, class leading storage pooling technology
AWS Storage Gateway - AWS Storage Gateway is a service connecting an on-premises software appliance with cloud-based storage.
btrfs - Btrfs is a modern copy on write (CoW) filesystem for Linux aimed at implementing advanced features...
Minio - Minio is an open-source minimal cloud storage server.