CalculiX
Simulation (FEA & CFD)Free three-dimensional structural finite-element program
- Licence
- GPL-2.0
- Status
- Open source
- Commercial OK
Structural and thermomechanical FEA solver developed by EDF
From GitLab, fetched 19 Oct 2026.
code_aster is a finite-element solver developed by the French utility EDF for structural mechanics, thermal analysis, fatigue and fracture. It is often used through the salome_meca platform.
| Runs on | Linux, Windows |
|---|---|
| Commercial use | Allowed Open-source licence (GPL-3.0): the Open Source Definition rules out restrictions on fields of use, including business use. |
Sources: opensource.org/osd. “Runs on” is from this listing. Blank means we haven't found it in official docs yet, not that it's unsupported.
Free three-dimensional structural finite-element program
Free, open-source computational fluid dynamics toolbox
Alternative to ANSYS
3D finite-element mesh generator with a built-in CAD engine
Alternative to ANSYS
Open-source platform for simulation pre- and post-processing
Alternative to ANSYS
Open-source multiphysics simulation software
Alternative to COMSOL
Open-source data analysis and visualisation for simulation results
Alternative to Tecplot