Wikipedia - Wikipedia is a free online encyclopedia, created and edited by volunteers around the world and hosted by the Wikimedia Foundation.
Fandom - The entertainment site where fans come first.
PCGamingWiki - PCGamingWiki aims to list fixes and workarounds for every single PC game
Miraheze - Miraheze is a wiki farm (hosts wikis) for free and with no ads, it also provides custom domains...
Wikiful - Wikiful is an online platform that makes it easy to build and share a wiki.
Oppia - Oppia is a free, open-source learning platform.