Engineering
- FreeCAD - powerful modular CAD/CAE platform with parametric modeling and full integration of the Python ecosystem.
- QCAD - 2D CAD application focused on creating technical drawings. The paid version includes an extended set of features.
- LibreCAD - fork and analog of QCAD, with slightly fewer capabilities than the original.
- ParaView - scientific data visualization tool intended for post-processing results of numerical simulations.
- CalculiX - finite element analysis (FEA) software, including a solver, pre- and post-processor for model preparation and results processing.
- OpenFOAM - computational fluid dynamics (CFD) toolkit for modeling fluid dynamics and other complex physical processes.
- Gmsh - universal mesh generator for preparing models for CFD/FEA calculations.
- Mayo - CAD file viewer and converter with a basic set of tools and capable of adequate measurements.
- CAD Assistant - alternative to Mayo, available in a version for mobile devices.