libmpich2-3 1.4.1-4.2ubuntu1 (amd64 binary) in ubuntu saucy

 MPICH2 is a high-performance and widely portable implementation of the
 Message Passing Interface (MPI) standard (both MPI-1 and MPI-2). It
 efficiently supports different computation and communication platforms
 including commodity clusters, SMPs, massively parallel systems, and
 high-speed networks.
 .
 This package includes the MPICH2 shared libraries.