A WikiWikiWeb is a collaborative hypertext environment, with an emphasis on easy access to and modification of information. MoinMoin is a Python WikiClone that allows you to easily set up your own wiki, only requiring a Web server and a Python installation (1.5.2, 1.6 or 2.0).
Most important new features: file attachments, definition list markup (glossaries), change notification via email, variable substitution when saving pages, edit preview, and improved documentation.