Reference desk – Serving as virtual librarians, Wikipedia volunteers tackle your questions on a wide range of subjects.
Site news – Announcements, updates, articles and press releases on Wikipedia and the Wikimedia Foundation.
Teahouse – To ask your first basic questions about contributing to Wikipedia.
Village pump – For discussions about Wikipedia itself, including areas for technical issues and policies.
Wikipedia's sister projects
Wikipedia is written by volunteer editors and hosted by the Wikimedia Foundation, a non-profit organization that also hosts a range of other volunteer projects: