Blender
From Wiki.OSArch
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)