HeeksCAD

If you're looking for a free and open source CAD application, HeeksCAD is the software for you. It provides you with a wide range of functionality, from importing solid models from STEP and IGES files to drawing construction geometry lines and arcs.

HeeksCAD also enables you to create new primitive solids, as well as make solids by extruding a sketch or by making a lofted solid between sketches. The software allows you to modify solids using blending or boolean operations and save them in a variety of formats, including IGES, STEP, and STL.

For printing, you can plot the 2D geometry or to HPGL. Additionally, HeeksCAD allows you to import and export dxf files, with support for lines, arcs, ellipses, splines, and polylines. You can also use the geometric constraints solver to create accurate drawings from rough sketches.

Overall, HeeksCAD is an excellent option for those looking for a high-quality CAD software without the hefty price tag. With its wide range of features, it is ideal for both beginner and advanced users alike. So, if you're on the hunt for a free and open source CAD software, give HeeksCAD a try!