MPICH comes with a fairly rich collection of example programs to illustrate its features. In addition to the extensive test suite and benchmark programs, there are example programs for Mandelbrot computations, solving the Mastermind puzzle, and the game of life that illustrate the use of the mpe library in an entertaining way. A number of simple examples illustrate specific features of the MPI Standard (topologies, for example) and have been developed for use in classes and tutorials. Many of the examples from [29] are included. For all of these examples, configure prepares the appropriate Makefiles, but they have to be individually built as the user wishes. One example is a moderately large complete nuclear physics Monte Carlo integration application in Fortran.