kevin926 After much smashing my face against the grinding wheel asking this same question we kind of came to a consensus that the question, although seemingly simple, is actually very dependent on what you are using it for.
1) sculpting softwares where you are doing the sculpting
zbrush is premiere product, blender is the free product, zbrush is far easier to use but neither is even somewhat in the easy category
2) putting shapes together that can be given exact measurements
autocad, solidworks and inventor are premier, fusion is free, tinkercad is not only free but online. Timkercad is very easy to use.
3) scanning software where you make files by scanning real things with a hand held or similar camera
revoscan (free) and similar proprietary software that comes with scanners. Revoscan is incredibly easy to use.
4) slicers that are used to send files to a specific printer
bambu, orca and meshmixer are all free for certain versions and all can do some minimal sculpting and cad-like building but were meant for prepping files to go to a printer. These are greatly useful if you are buying already created files or are getting them from your scanner
Meshmixer is hands down the most versatile for building shapes and has lots of users to help with questions. We have a dedicated meshmixer thread on therpf.
5) Online scanners, A.I. modelers from single photos and videos of the object
2dto3d (does minimal flat router rendering), bambu labs MakerWorld online tools available at makerworld's community website. These will create files but you would still need a slicer to finish them. Makerworld tools are nearly automatic and make incredible files while you don't learn anything. Free, free, free and amazing.....and free
So to wrap up your seemingly simple question which isn't even somewhat simple..... what do you want to do, how do you want to do it, and what will you do with the files once you have them?