You could have downloaded CST CAD Navigator 1.0.0.98 from our software library for free. CST CAD Navigator relates to Photo & Graphics Tools. The actual developer of the program is Cadsofttools.
From the developer:
CST CAD Navigator is an easy-to-use CAD software compatible with Windows, macOS, and Linux. It enables to open and convert different 2D drawings and 3D models, get their dimensions and create section views.
You may want to check out more software, such as CAD Viewer, CAD Design Icons or RED CAD EI, which might be similar to CST CAD Navigator.
3D Modeling
General