For 3D drawing of piping, software recommendations include Autodesk Inventor and SolidWorks, both noted for their ease of use in piping design. Budget considerations are crucial, as prices for these programs can be quite high, often several thousand dollars, though student discounts are available. Google SketchUp is mentioned as a free alternative with useful features for basic piping tasks. The discussion emphasizes the importance of defining what "best" means in the context of specific needs and budget. Overall, SolidWorks and Inventor are favored for their capabilities in professional settings.