Is there any free version of nanoCAD?

nanoCAD v.5 is a free CAD software.

nanoCAD Free offers a familiar interface with native DWG support. This easy-to-use free CAD software, being a legacy version 5 of the platform, is suitable for both individual and business use on non-profit projects. Registration and yearly license renewal are entirely free.

Note: No Technical Support is available for nanoCAD v.5