MeatballWiki
Appearance
MeatballWiki (now at Meatballwiki.org) is a sister site of the first wiki named WikiWikiWeb. It has over 5,000 pages and was meant to be something of a meta wiki, describing internet culture, internet collaboration, wiki concepts, now forgotten wikis, and proposing how future wikis could improve or operate. It predated Wikipedia and had nothing to do with literal meatballs.
It is notable for still being editable despite being one of the first self-hosted wikis.