MPICH2 1.5 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. MPICH2 lies within Development Tools, more precisely IDE.
You can set up this free PC program on Windows XP/XP Professional/Vista/7/8/10/11 32-bit. This free program was originally developed by Argonne National Lab.
Commonly, this program's installer has the following filenames: guiMPIJob.exe, MPDUpdate.exe, MPIConfig.exe, mpiexec.exe and Uninst-mpich2-1.0.3.exe etc. We recommend checking the downloaded files with any free antivirus. The most popular versions of the program are 1.5, 1.4 and 1.3.
From the developer:
MPICH2 is an all-new implementation of MPI, designed to support research into high-performance implementations of MPI-1 and MPI-2 functionality. In addition to the features in MPICH, MPICH2 includes support for one-side communication, dynamic processes, inter-communicator collective operations, and expanded MPI-IO functionality. Clusters consisting of both single-processor and SMP nodes are supported.
You may want to check out more software, such as FlashDevelop, MinGW or ComponentOne Studio for ActiveX, which might be similar to MPICH2.