Garfield + Markov chains
First, someone removed Garfield's speech bubbles. Then, someone removed Garfield. Now, Josh Millard has added Markov chains to create Garkov
(Garkov link via Monochrom.)
Update: Jason Kottke has collected a boatload of Garfield variations. Most of them are worth a few seconds of your time, and may evoke the fleeting thought of a chuckle. In other words: it beats regular Garfield.