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

Founded which 3d software should i learn for 3d printing models & stl files for printing
Electric Longboard
tallaustin
Lithophane Photo
Tariq_ali
Mr Nozzington
patcanbefound
Simple bubble Wand
TimsterPostma
Contour I BM005
ENABLE3D
Elder Wand Holder
JasonLane
Kaws
FLIEFLAFLAP
Orihon Accordion Book
tomburtonwood