OpenFOAM
Simulation (FEA & CFD)Free, open-source computational fluid dynamics toolbox
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- ★ 2.3k
- Licence
- GPL-3.0
- Updated
Alternative to ANSYS

3D finite-element mesh generator with a built-in CAD engine
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.
Free, open-source computational fluid dynamics toolbox
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
Open-source multiphysics simulation software
Alternative to COMSOL
Open-source data analysis and visualisation for simulation results
Alternative to Tecplot