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OpenFOAM uses some additional software for visualisation (ParaView), parallelisation (OpenMPI) and decomposition (options including Scotch/PtScotch, Zoltan, METIS/ParMETIS). By default, OpenFOAM is configured to use standard system installations of these packages, except for some packages (Scotch and Zoltan) whose source code is provided and automatically compiled, as described here: https://openfoam.org/download/source/third-party-software

Users can optionally compile software packages rather than install system versions. To do so, they need to download the source code of the relevant package(s) before running installation script(s).

Links to the source code of recommended versions of additional packages are listed below. Any package selected should be downloaded and unpacked in the third-party directory (ThirdParty-dev).

• https://gforge.inria.fr/frs/download.php/file/38187/scotch_6.0.9.tar.gz
• This package is already present in the third-party directory.

• https://github.com/sandialabs/Zoltan/archive/refs/tags/v3.90.tar.gz
• This package is already present in the third-party directory.

• METIS is software used for decomposition, released under a permissive open source licence, which itself runs in serial.
• ParMETIS is the equivalent software which runs in parallel, which is released under the following licence: https://github.com/KarypisLab/ParMETIS/blob/main/LICENSE
• METIS: http://glaros.dtc.umn.edu/gkhome/fetch/sw/metis/metis-5.1.0.tar.gz
• ParMETIS: http://glaros.dtc.umn.edu/gkhome/fetch/sw/parmetis/parmetis-4.0.3.tar.gz

• https://www.open-mpi.org/software/ompi/v2.1/downloads/openmpi-2.1.1.tar.bz2

• https://www.paraview.org/files/v5.11/ParaView-v5.11.2.tar.gz
• This package is automatically downloaded by its installation script.