OpenFOAM
Simulation (FEA & CFD)Free, open-source computational fluid dynamics toolbox
- Stars
- ★ 2.3k
- Licence
- GPL-3.0
- Updated
- Commercial OK
Alternative to ANSYS
Open-source multiphysics simulation software
From GitHub, fetched 19 Oct 2026.
Elmer is a finite-element multiphysics suite from CSC (Finland) covering fluid dynamics, structural mechanics, electromagnetics, heat transfer and acoustics, with a GUI (ElmerGUI) for setting up cases.
| Runs on | Windows, macOS, Linux |
|---|---|
| Commercial use | Allowed Open-source licence (GPL-2.0): 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, open-source computational fluid dynamics toolbox
Alternative to ANSYS
Open-source data analysis and visualisation for simulation results
Alternative to Tecplot
3D finite-element mesh generator with a built-in CAD engine
Alternative to ANSYS
Structural and thermomechanical FEA solver developed by EDF
Free three-dimensional structural finite-element program
Open-source platform for simulation pre- and post-processing
Alternative to ANSYS