Screamer Forums and Screamer gallery have returned.
The Screamer Forums will likely remain read only unless it's known that it will be active, since forums in general are kind of dead because of Discord.
Topkek.co
Topkek.co was a screamer website. It showed a flashing image of Jeff the Killer along with a very loud scream. Some people say it also drive-by downloaded extremely malicious malware. The website is now closed. There is nearly nothing known about this website except for that it was often spammed on 4chan's /b/ board.