This site has full episodes of some of the most popular cartoons on TV. Now you can watch Family Guy, Futurama, American Dad, and South Park all in one place.
They have a pretty complete collection of higher quality videos for each of those four cartoons.
The navigation is straightforward. Just click on the cartoon and choose an episode. You'll start watching the video in seconds.
It seems kinda weird to me that this site left out the Simpsons. You would think that a lot more people would watch episodes of the Simpsons than American Dad...but who knows? Either way, this site makes it easy to find cartoons, without having to visit multiple specialty sites, like;