They aren’t exactly orthographic projections of the final product ... but OpenSCAD can extrude DXF files into 3D shapes. Inkscape can export DXF directly, but it has a lot of limitations.

You can set up your rendering viewport for an orthographic view right in the Enscape window. Notice the projection options in the top right corner of the screen. If you don’t see the buttons ...

This isometric drawing shows the plan and front and side elevations of the shape. Orthographic projections are working drawings in either a first or third angle projection and show each side of a ...