Catia is a famous 3D CAD design and drafting software made by Dassault Systèmes. The latest version as on Dec 2020 is CATIA R2021x. You can download the 3D PDFs and 2D detailed drawings and practice them on Catia. Catia was initially designed to help 3D surface modeling for fighter jets but later improved to suit all industries and all types of CAD modeling. To this date, CATIA is one of the best software for the surface modeling in various industries.