Comic Strips and Single Panel Cartoons

Cock & Bull
Dog eat Doug
Guy in a Bush
Imagine THIS
Imy
Marooned
Pinkerton
The Argyle Sweater
Tim Whyatt
xkcd

Other Sites/People I Like

Tall Tale Features (the cartoonist collective I belong to)
Comics Coast to Coast
The Daily Cartoonist
Two Neat
She's SO Creative
Kenny Kane, Comedian
What's Cooking with Kids
Just Wrong Greetings
Healthy Penis (I do the cartooning for this campaign)