I drew this because...well, I am.
Most of my drawings, including this one, are drawn and colored using a free software program called SmoothDraw. The felt pen is great for drawing cartoons. Very smooth. I sometimes use Paint Shop Pro or Photoshop if I want to use effects or filters. But for drawing and coloring cartoons, you don't really need to spend any money.
This happy little dog was drawn, quartered and colored using Smoothdraw. No money spent. Just a little time. See how cute free can be? You can download SmoothDraw here