FreeCAD is a general purpose parametric 3D CAD modeler. The development is completely Open Source (LGPL License). FreeCAD is aimed directly at mechanical engineering and product design but also fits in a wider range of uses around engineering, such as architecture or other...
FreeCAD vs SOLIDWORKS opinions
Unfortunately not usable, after several years of using freecad, I quickly saw its limits. It is not a parametric software, indeed the topological naming problem makes this software fundamentally broken. The realthunder fork fixes some of these problems. fork or not, some advanced actions are still impossible and the different workbench are too isolated, some objects created with a workbench can't be modified by another one.
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AS far as I have tried, FreeCAD is the only FOSS alternative to Solidworks/Catia/PTC that has a funtional workflow. It is the best of a poor bunch.
It's free for both personal and commercial use
LibreCAD (originally QCad then CADuntu) is an open source 2D CAD application for Windows, Apple and Linux. It is based on Qt, which is a leading cross-platform application and UI development framework.
LibreCAD vs SOLIDWORKS opinions
2D application, not 3D like Solidworks
BRL-CAD is a powerful cross-platform open source solid modeling system that includes interactive geometry editing, high-performance ray-tracing for rendering and geometric analysis, image and signal-processing tools, a system performance analysis benchmark suite, libraries for...
SolveSpace is a parametric 3D CAD program with extrude, revolve, union and difference functions. Save/Export as DXF, PDF, SVG, STL, STEP. Mesh generation expected by most 3d printers. Constraint solver point tracing for motion analysis.
SolveSpace vs SOLIDWORKS opinions
It shows that it can open .step files and I have a few GrabCad files that I want to check out and see it I can at least save to other file formats, ;ie .dwg
BricsCAD the first all-in-one CAD design solution in .dwg that answers all your needs; 2D drafting, 3D modeling, mechanical design, and BIM. BricsCAD is a cost-effective, innovative, and familiar CAD solution.
BricsCAD vs SOLIDWORKS opinions
It is an AutoCAD clone, not SolidWorks.
QCAD is an application for computer aided drafting in 2D. With QCAD you can create technical drawings such as plans for buildings, interiors, mechanical parts or schemas and diagrams.
For more than 20 years being always at the forefront of 3D, Open Cascade has gained considerable expertise in geometric modeling. In order to demonstrate software developing capabilities the company decided to come up with a sample of parametric CAD modeler — CAD Builder.
VariCAD is compact, fast, easy to use, and provides everything necessary for mechanical design. VariCAD is sold "fully loaded", including all features and functions, for one affordable price. The system contains: