There are many different kinds of graphics software you can use to edit images. In most you can edit photos and images, while some can create 3D images from scratch.
Drawing software has similar features to painting software but uses vector and outputs vector images. Vector images are made up of lines, curves and shapes based on coordinates. Examples of drawing software:
Adobe Illustrator
Inkscape
Xara Xtreme
Vector images do not lose quality when they are resized.