HandWiki is the world's largest wiki-style encyclopedia dedicated to science, technology and computing. It allows you to create and edit articles as long as you have external citations and login account. In addition, this is a content management environment that can be used for collaborative editing of original scholarly content, such as books, manuals, monographs and tutorials. Such documents can link thousands of existing HandWiki articles. In order to create and edit this wiki, you need to register using the top-right menu.
Fandom - The entertainment site where fans come first.
Editthis - A free wikifarm project allowing to keep private wiki and build it up through MediaWiki syntax.
Miraheze - Miraheze is a wiki farm (hosts wikis) for free and with no ads, it also provides custom domains...
BookStack - An open source knowledge management application that's focused on ease of use.
Wikiful - Wikiful is an online platform that makes it easy to build and share a wiki.
Wikipedia - Wikipedia is a free online encyclopedia, created and edited by volunteers around the world and hosted by the Wikimedia Foundation.