NexentaStor is described as 'Network Storage Appliance featuring the zfs filesystem, which provides block-level checksumming & automated tier management most notably' and is a Server Management Tool in the System & Hardware category. There are more than 10 alternatives to NexentaStor for a variety of platforms, including Linux, VMware vSphere Hypervisor, Microsoft Hyper-V Server, Windows and Red Hat. The best alternative is StorPool. It's not free, so if you're looking for a free alternative, you could try glu or Pallet. Other great apps like NexentaStor are vSAN (Paid), SANsymphony (Paid), LINBIT VSAN (Paid) and Sprinkle (Free, Open Source).
StorPool is an intelligent software-defined storage solution that allows service providers, enterprises and other Cloud builders to run data storage on standard x86 servers, instead of on expensive and inefficient storage arrays (SANs).
LINBIT® VSAN SDS for VMware is a software defined storage solution for small and medium-sized VMware® deployments. It is also usable on an Oracle VM Server for x86 installation or any other Hypervisor software.
Pallet is platform for agile and programmatic automation of infrastructure in the cloud, on server racks or directly on virtual machines. Pallet provides cloud provider and operating system independence, and allows for an unprecedented level of customization.
A simpler way to manage servers online. Commando.io empowers users to be more efficient, improve their workflow, and eliminate anxiety over server provisioning, maintenance, and deployment. DropBox simplified online storage, GitHub simplified revision control, Commando.