Following software used in projects:
freeCAD and Salome-Meca is used to generate the 3D model and export the boundaries like Inlet, Outlet, Walls etc.
https://www.freecad.org/?lang=de
https://code-aster.org/V2/spip.php?article303
Excell is used to prepare meshing and run scripts like blockmeshDict, surfaceFeatureExtractDict, snappyHexMeshDict, cfMeshDict etc.
https://www.microsoft.com/de-de/microsoft-365/excel
openFOAM+ is used for Meshing and, CFD-calculations depending on your simulation type like steady state or transient, laminar or turbulent, compressible or incompressible aso.
paraView/paraFoam enables the evaluation of the results visually or by calculation