OpenFOAM has a large user base across most areas of engineering and science, from both commercial and academic organizations.
OpenFOAM has an extensive range of features to solve anything from complex fluid flows involving chemical reactions, turbulence and heat transfer, to solid dynamics and electro-magnetics.
OpenFOAM is a free, open source CFD software package developed by:
CFD Direct is the primary developer of OpenFOAM, on behalf of the OpenFOAM Foundation, the copyright holder and licensor of OpenFOAM http://www.openfoam.org