Incredible Vector Illustrations by Jorgepacker. There are number of vector artists who are famous in this field like  Nathan Jurevicius, Catalina Estrada, J. Otto Seibold and Petra Stefankova.

Vector graphics editor Adobe illustrator is quite handy tool for illustrators as it can help converting raster images into vectors without much effort, you just need to know the basics, but of course if you want to be a professional, to produce incredible work like this you have to struggle harder.