What is 8kun

8kun.net is a website running OpenIB as a result of the 2017 April Fools' Day hack. OpenIB is a security-focused version of infinity, an open-source software that allows anyone to create and manage their own anonymous imageboard without any programming or webhosting experience for free. infinity is based on vichan (pronounced sixchan), which in turn stems from an older, abandoned project called Tinyboard.

https://8kun.net/faq.html#what-is-8kun