This small distro is incredibly fast and effective, we use it for SMB with AD authentication, around 300 clients, and to provide a few large LUNs to ESXi. The performance is way better than commercial products, just set it up and you'll forget it's there
Ansible - Radically simple configuration-management, application deployment, task-execution, and multi-node orchestration engine
StorPool - StorPool is designed from the ground up to provide cloud builders, shared hosting providers and MSPs with the most resource efficient storage software on the market.
Salt - Fast, scalable and flexible software for data center automation
DataCore SANsymphony - SANsymphony is a Software-Defined Storage powered by DataCore Parallel I/O technology for virtualization solution.
Chef - Automation for all of your technology. Overcome the complexity and rapidly ship your infrastructure and apps anywhere with automation.
VMware vSAN - VMware vSAN is radically simple, enterprise-class software-defined storage powering VMware hyper-converged infrastructure.