Blender

See https://www.blender.org/

You can find relevant add-ons to blender on the Blender Add-on category page

There is also a video on 10 essential addons for architectural design that come with Blender 2.81+ by UH Studio description of some add-ins

Blender Tutorials

Blender for Architects by ETHZ CAAD (ETH Zurich - Computer-Aided Architectural Design) (Version 2.79).

UH Studio Blender Architecture YouTube channel