A collaborative writing project to build the world's largest how-to manual. A spin-off of eHow.

Wikibooks is a collection of free, open-content textbooks that you can edit.

Free, easy tools for creating wiki web sites where the readers are also the writers.

From the guys who brought you Wikipedia, this wiki focuses on current events.

The wiki that dwarfs all other wikis. From heavy metal umlaut to heavy water, this wiki encyclopedia is the closest thing to "The Hitchhiker's Guide to the Galaxy". Available in many languages.

WikiHealth provides free, collaborative health and wellness information on topics ranging from clinical terminology to yoga to natural healing.

WikiFAQ provides a collaborative environment for the writing and maintaining of frequently asked question (FAQ) lists.