The getting started with MPI exercise.
A handy page with links to man pages for MPI calls.
The MPI Forum, where you can find the official MPI standards.
The OpenMPI homepage, source of a widely used free implementation of MPI.
The MPI Homepage at Argonne National Lab. Go here to download the latest version of MPICH, learn about the latest developments in the world of MPI, and see links to all kinds of MPI-related resources.
Copies of Bill Gropp's tutorial on MPI (html, postscript, four-up postscript).
The book Using MPI, by Gropp, Lusk, and Skjellum is a good introduction to MPI. The sample programs from that book are available here.
Author's home page for Parallel Programming with MPI, by Peter Pacheco. This is another good intro to MPI and you can download the book's examples from this web site.
For all the details on MPI you can refer to the two volume series MPI --- The Complete Reference, available from MIT Press: Volume 1 and Volume 2
An example of how to time sections of code in an MPI application.
Several MPI examples from the Quinn textbook are available in /home/staff/ribbens/Quinn.