http://www.cs.washington.edu/homes/natetrue/gar.html
Has your comic strip become an endless morass of predictable throwaway gags and bad one-liners that stopped being funny sometime during the Reagan administration? Why not try mixing things up a bit? This page grabs individual panels from Garfield cartoons and mixes them up at random. On occasion, the results even end up better than the originals...
The Random Garfield comic generator
I was impressed by how nearly coherent that all comes out. But, then again, I follow Jerkcity and Pokey the Pengiun (there used to be a randomizer for this someplace), so I might have abnormal expectations. It definitely improves the original.
"Can they really get inside my head?"
"As long as you keep an open mind."
"As long as you keep an open mind."
Aww, it's been ceased-and-desisted 
I found a bizarre old one I managed to do before it went poof, though
I found a bizarre old one I managed to do before it went poof, though
"This is not an alien life form! He is an experimental government aircraft!"