AutoCAD

All of the alternatives above work well if you are starting from scratch and are in the market for new software. DraftSight is no longer free. If you have any legacy AutoCAD drawings you are going to encounter problems as we did. Sometimes old files won't open or save correctly. Sometimes not all of the data comes with the file. When you open them, layers, templates, etc. are missing. Plot configurations don't line up if you need to use a large plotter vs just a small printer.

I use Revit far more than I use AutoCAD. AutoCAD is great for simple linework, but even then I will often create the lines in Revit and then export to AutoCAD for final touches and printing. AutoCAD is a bit easier for large-format prints, which is why I almost always end up using it after starting in Revit.

PTC Creo and SOLIDWORKS have a separate module wherein we can create 2D drawings of the parts and assemblies modelled in them. But they generally created problem in creating circuit diagrams where in we need to manually sketch using different option. And when it comes to created sketches manually, AutoCAD has vast features available.

AutoCAD is much more stable and comes with 3D capability as standard. DraftSight is less stable and requires the pro version for 3D capability, but it is also 1/4 the price of AutoCAD.

As we all know that AutoCAD is a basic Drafting software used to drawing all of 2D object so all above softwares mentioned as as used as 2nd one after developing the plan on AutoCAD. So I do prepare plans on AutoCAD and develops them on above software. So basically my first preference will be AutoCAD