4chan

4chan is an imageboard website made in 2003. The site hosts multiple different topics boards with topics, including video games, fitness, politics, music, anime, and more. It is an English-language counterpart of Futaba Channel (known as 2chan at the time of the site's creation), a Japanese imageboard site discussing online culture. 4chan is known for popularizing several internet memes made by its community, and other than that, it also became known for being involved with screamers and shock sites including Jeff the Killer, Fukouna Shoujo 03, Smile Dog, Glory Hole Foundation, Poochee and Pansy and others. The site doesn't require registration, so users can post anything on boards anonymously, but users can also use a nickname for themselves on the site.

History
NOTE : This list is incomplete, you can help by adding screamers and shock sites involving 4chan on this list.

As mentioned, the site was introduced on 2003 by Christopher Poole, better known online as "moot", when he was at 15-years-old. The site was born shortly after Poole copied Futaba Channel's source code and translated the text into English. He then advertised the site for people interested in Japanese culture. Poole left 4chan after when this incident happened; he officially announced that he sold the site to Hiroyuki Nishimura, a founder of 2channel. 4chan users are also one of the most recognized fanbase of Encyclopedia Dramatica.

In screamers
The earliest screamer to be on 4chan was Smile Dog. The famous story of this creepypasta explains that there are no copies of the original Smile Dog, but fake variations have been spreading across 4chan's paranormal-related board, /x/, on 2008.

A flash animation called Derpy animation.swf was first mentioned on January 3, 2012 in /f/, a board list of flash animations. The animation was supposed to lure My Little Pony fans into thinking the screamer was a list of Derpy's animations.

On March 14, 2018, Shuaib "Shuaiby" Aslam started a Livestream on his YouTube channel titled "Hey". Tarp was put on the windows to cover any debris. He starts a Discord call and two other people can be heard talking, one of them crying. A bit later, he holds out a piece of paper with the text "Bye /r9k/", loads a shotgun and finally shoots his face, splattering blood on the ceiling.

On November 18, 2021, a 4chan user named Armus posted a thread claiming to have hacked kingliam3's account along with the popular Scratch copy of the Flappy Bird game and added Ronnie McNutt's suicide on it.

Jeff The Killer controversy
4chan quickly became involved with creepypasta Jeff The Killer shortly after an anonymous claim that the image of Jeff was revealed to be an extensively unedited picture of a woman named "Katy Robinson", who had committed suicide in 2008. However, some users claimed that it was a picture of a dog with a broken jaw. A story was created by a few /b/ users to explain the origin of this image: A woman named "Victoria" was a live-streamer on Stickam and used 4chan as a way to self-promote herself for fame; One user posted a screenshot of her face with the caption "Am I pretty?", Later, users started posting their own photoshop versions of the image, with one of the users posting the actual, old version of Jeff's face with the caption "Now you are." Victoria quickly found out about the post and disappeared without a trace.

However, after 4chan's research on these rumors about the origin quickly revealed that the woman in the picture was named "Heather White", and the picture of Jeff was originally uploaded on the Japanese site, pya.cc, on November 16, 2005. The Jeff image originally came from a less unedited photo of a pale woman with googly eyes smiling, which was also uploaded to that site; the image was edited to make the smile enlarged and stretched out, and the eyes to have white and black pupils, which became known as the appearance of the character of Jeff.

Links
NOTE : The following website contains pornography!
 * 4chan.org
 * Safe for work link (no NSFW boards): https://4channel.org