Software for modeling STL-models suitable for 3d printing

If you want to print something, then you need a digital model for this - for 3d printers this is a sore point, those models that are sent for printing often do not meet the requirements, or people just want to print the object from the JPG image found on the Internet.
if you do not have a 3d model, then you will have to either create it or seek help from a specialist. In this video we will highlight the main CAD programs for modeling an STL object.