DeinoMPI is an implementation of MPI-2 for Microsoft Windows. DeinoMPI is a derived work from MPICH2 provided by Argonne National Lab.  By starting with the MPICH2 code base DeinoMPI inherits a stable and complete implementation of the MPI-2 standard.  DeinoMPI heavily modifies the original code base and does not rely on anything from Argonne National Lab.

More details about DeinoMPI.