Question2Answer - A Q&A site helps an online community to share knowledge.
Fandom - The entertainment site where fans come first.
Stack Overflow - Community-based Q&A part of the Stack Exchange platform.
Miraheze - Miraheze is a wiki farm (hosts wikis) for free and with no ads, it also provides custom domains...
The Answer Bank - The Answer Bank is the UK’s leading question-and-answer site.
Wikiful - Wikiful is an online platform that makes it easy to build and share a wiki.