This is another free image site that explores hundreds of different and unconventional fetishes and kinks with various gifs and images. You can find anime, manga, hentai and cartoon characters here in various sexually explicit acts.
There are tens of thousands of pictures on Gelbooru.com which aren't split into traditional categories but rather filtered with a long list of different and sometimes very specific tags. That way you can find porn cartoons that contain, for example, underwear, pink hair and oral, or furries, anal and cum, and lots of other combinations. However, some things are also explicitly banned, so check out the TOS. Image size and quality may vary, but poorly compressed content is not allowed.
If you've never been on a website like this, don't worry as there are help sections to get you on your way, as well as a Wiki. Other than that, you have a section for tags, pools (groups), a tracker tickets listing, user forum and comments. Overall, it is a quite simple layout and straightforward to use once you get the hang of it, and there aren't that many ads.
If you want to see your favorite anime, manga, and cartoon characters in SWF as well as explicit images, check out Gelbooru. You'll find everything from candid and erotic to hardcore and fetish filled content here.