MPI is a popular, widely supported standard for writing parallel programs using message passing. The version available on DAS-2 is MPICH-GM, which uses Myricom's GM as its message passing layer on Myrinet. MPICH-GM is based on the well-known MPICH package from Argonne/MSU. See also the MPICH documentation collected locally (by Thilo Kielmann).
Compilation of MPI programs with MPICH-GM is done with the scripts mpicc for C programs and mpif77 for Fortran-77 programs; these scripts reside in /usr/local/mpich/mpich-gm/bin/. The scripts are self-contained: no extra flags to indicate MPI include directories or libraries are needed.
The running of MPI programs on DAS-2 by means of the scheduling system is explained here.
Some locally written or massaged applications can be found in /usr/local/VU/mpi-examples/misc/.