MPI

1. MPI standard documents

   Official MPI Forum index of the MPI standard versions.

2. MPI 4.1 report

   Point-to-point, collectives, communicators and one-sided.

3. Open MPI docs

   Open MPI user documentation for building, launching and tuning MPI programs.

4. Open MPI launching

   mpirun and mpiexec options, hostfiles, slots, process binding and mapping.

5. Open MPI tuning

   MCA parameters, transport selection and performance tuning of Open MPI.

6. Open MPI man pages

   Man pages for MPI calls such as MPI_Send, MPI_Recv, MPI_Allreduce and MPI_Comm_split.

7. MPICH documentation

   MPICH installer, user and developer guides.

Each section links to the official page. Titles and summaries by Extra Credit; the docs belong to their authors.