Altair Activate - Altair Activate is an open & flexible tool for rapidly modeling and simulating products as multi-disciplinary systems in the form of 1D models (expressed as signal-based or physical block diagrams), optionally coupled to 3D models.
ANSYS Fluent - ANSYS engineering simulation and 3D design software delivers product modeling solutions with unmatched scalability and a comprehensive multiphysics foundation.
Xcos - Xcos is a graphical editor to design hybrid dynamical systems models.
OpenFOAM - OpenFOAM® - Official home of The Open Source Computational Fluid Dynamics (CFD) Toolbox.
OpenModelica - OpenModelica – A Free Modelica Environment!
Autodesk Fluid Flow - Autodesk Fluid Flow is an industry-leading fluid dynamics software that helps to enhance product performance and reliability.