MS paint -> Medibang paint -> procreate
MS paint -> GIMP -> paint tool sai -> clip studio paint
MS Paint -> Corel Photopaint -> Photoshop -> Open Canvas* -> Paint Tool SAI
*I think that was the name, but I don't quite remember for sure 🥲 there were others, but those sure are main ones. Special mention of oekaki boards, there was a time I used them a lot ^^
MS paint -> Medibang paint -> procreate