OpenFOAM
Simulation (FEA & CFD)Free, open-source computational fluid dynamics toolbox
- Stars
- ★ 2.3k
- Licence
- GPL-3.0
- Updated
- Commercial OK
Alternative to ANSYS
Gmsh
3D finite-element mesh generator with a built-in CAD engine
★ Stars125125 on GitLab (gitlab.onelab.info)
Last commit18 Oct 2026
LicenceGPL-2.0+Per the project
View on GitLab ↗
From GitLab (gitlab.onelab.info), fetched 19 Oct 2026.
Gmsh generates 2D and 3D finite-element meshes from built-in or imported (STEP, IGES) geometry, with a GUI, its own scripting language and Python, C++ and Julia APIs.
Fit: files and licence
| 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 alternative to
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