Apps similar to QymCad include FreeCAD, which is free and open source. Other options are SketchUp, SOLIDWORKS, FluidCAD and Onshape. You can choose from more than 10 CAD Software like QymCad for Windows, Mac, Linux, the web and iPad.
KOMPAS-3D is for creating three-dimensional associative models for individual parts and assembly's containing both original and standardized elements. The parametric technology allows quickly obtaining models for typical products basing on a once designed prototype.
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SolidWorks is a CAD software that can be used to create parametric models, assemblies, and drawings. It's typical to work with relationships (the alignment of elements with one another) and dimensions (alignment through values).
