C

CalculiX

Free three-dimensional structural finite-element program

CalculiX is a free FEA package with a solver (CCX) that uses an Abaqus-like input format, and a pre/post-processor (CGX). It covers static, dynamic, thermal and nonlinear analysis, and is used as a solver by FreeCAD and PrePoMax.

Free alternative to

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C

code_aster

Simulation (FEA & CFD)

Structural and thermomechanical FEA solver developed by EDF

Licence
GPL-3.0
Status
Open source

Alternative to Abaqus, ANSYS

OpenFOAM

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Gmsh

Simulation (FEA & CFD)

3D finite-element mesh generator with a built-in CAD engine

Licence
GPL-2.0+
Status
Open source

Alternative to ANSYS

SALOME

Simulation (FEA & CFD)

Open-source platform for simulation pre- and post-processing

Licence
LGPL-2.1
Status
Open source

Alternative to ANSYS

E

Elmer FEM

Simulation (FEA & CFD)

Open-source multiphysics simulation software

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GPL-2.0
Status
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Simulation (FEA & CFD)

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BSD-3-Clause
Status
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Alternative to Tecplot

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