I draw zombies, among other things, using pens, watercolors, and oil paints. I am mostly on Google+ and post tonnes more work there. I'm also working on a project called the 1000 zombies project, where I draw people as zombies. This is a publicly funded project so if you want to see yourself with undead eyes, it will only cost you $25 and you get to join the horde. And you get a bunch of other things too, like high res scan to print out, ebook to read, etc.
I have my art all over the place including zazzle, society6, redbubble, spreadshirt and etsy. If you want to commission me, just let me know.