Fandom - The entertainment site where fans come first.
Miraheze - Miraheze is a wiki farm (hosts wikis) for free and with no ads, it also provides custom domains...
Investopedia - Investopedia has a lot of information to share with business mind people.
MyWikis - A premium wiki host with top-class quality, excellent support, and VisualEditor (a WYSIWYG...
Wikiful - Wikiful is an online platform that makes it easy to build and share a wiki.
BookStack - An open source knowledge management application that's focused on ease of use.