PetaSAN - PetaSAN is an open source Scale-Out SAN solution offering massive scalability and performance.
VMware vSAN - VMware vSAN is radically simple, enterprise-class software-defined storage powering VMware hyper-converged infrastructure.
Dell EMC UnityVSA - dell-emc-unityvsa-overview-deployment
AWS Storage Gateway - AWS Storage Gateway is a service connecting an on-premises software appliance with cloud-based storage.
XigmaNAS - File Sharing, OS & Utilities, and Security & Privacy
Minio - Minio is an open-source minimal cloud storage server.