Application Vault- phpWiki

A WikiWikiWeb is a web site where anyone can edit the pages through an HTML form. Linking is done automatically on the server side; all pages are stored in a database. The addictive quality of a Wiki is that making pages is as simple as making a link to them. If they don't yet exist, the page link will be followed by a hyperlinked question mark; follow that link and you can define the new page.

With this setup, you can update and create pages from anywhere there is a web browser handy.

Learn More about phpWiki here.