| [MPICH](http://www.mpich.org/) | MPICH v3.x is an open source high-performance MPI 3.0 implementation. It does not support InfiniBand (use MVAPICH2 with InfiniBand devices). |
| mvapich2 | |
| [OpenMPI](http://www.open-mpi.org/) | The Open MPI Project is an open source MPI-2 implementation. |