which 3d software should i learn for 3d printing —

Founded which 3d software should i learn for 3d printing models & stl files for printing
Organizer
SelfCAD
How to 3D print Your Brain
threeD_Designer
Recreus sandals
Recreus
Parametric Slide
Ken_Applications
Cycle of Universe
ermunishmahajan
Modular robotic arm
raphaelNieme
NeoPixel Stick Case
nuclearemp
Display Shelf
BuffySummers
ASA Bottle Cage
Prusament
Car Mascot
Hermes10