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

Founded which 3d software should i learn for 3d printing models & stl files for printing
Socrates
Kvant_64ru
Triad with inner circle
Samurai Adler
Froggy Couch
dixiecups
Demon Nun
cryptodude
Nerd Glasses
Miguel
WowStick Case
Sapitch