Microsoft Windows HPC Server 2008 R2

Microsoft Windows HPC Server 2008 R2 is designed for high-end applications that require high performance computing clusters. Windows HPC Server 2008 R2 Suite provides enterprise-class tools, performance, and scalability for a highly productive HPC environment. The Suite provides a complete and integrated cluster environment including the OS, HPC Job Scheduler, message passing interface v2 (MPI2), service-oriented architecture (SOA) interactive application support, cluster management, monitoring, the ability to distribute Excel calculations, and the ability to harness idle Windows 7 workstations.
LicenseFree to try
Operating System Windows Windows Server 2008