TrueNAS Core - TrueNAS Core (formerly FreeNAS) is a storage operating system strong and robust enough to meet the needs of enterprise level businesses.
PetaSAN - PetaSAN is an open source Scale-Out SAN solution offering massive scalability and performance.
OpenMediaVault - OpenMediaVault is the next generation network attached storage (NAS) solution based on Debian Linux.
XigmaNAS - File Sharing, OS & Utilities, and Security & Privacy
Dell EMC UnityVSA - dell-emc-unityvsa-overview-deployment
Unraid - Simplicity. Flexibility. Scalability. Modularity. Unraid empowers you to build the system you’ve always wanted using your preferred hardware, software, and operating systems.