Wikia

Silk is a web-based platform that allows content creators to provide their content in a more structured manner on the web. It enables users to choose the data they want …

Wikkii provides fully featured hosting for wikis on any topic, and best of all it's 100% free. All you need to do is Register as a user there, then click …

VanillaWiki is the best place to host your wiki articles when they aren't fit for wikipedia.org. I made this website when I realized Wikia was the current best option for …

A collaborative wiki of lists. Lists support images, maps, file attachments, as well as revision history. All lists and items can receive votes and comments, and the highest voted lists …

Stubia is a mobile encyclopedia that limits each article to 160 characters: this limitation makes each topic easy to understand.

A free wikifarm project allowing to keep private wiki and build it up through MediaWiki syntax. It is also possible to configure different user group rights by yourself.

A wiki-based encyclopedia, the primary difference between Citizendium and Wikipedia being that Citizendium has "subject matter expert" editors, chosen by the community to validate pages and content.