Open MPI is an open source Message Passing Interface implementation that has been developed and maintained by a consortium of academic, research and industry partners.
OpenMPI is therefore able to combine the expertise, technologies, and resources of the entire high-performance computing community to build the best MPI library available. Open MPI offers advantages for system and software vendors, application developers, and computer researchers.
It is characterized by its high efficiency and performance for execution in distributed environments (computer clusters).