XWiki is a WikiWiki clone written in Java thatsupports many popular features of other Wikis likethe Wiki syntax, version control, attachments,security, and searching, but also many advancedfeatures like templates, database and dynamicdevelopment using the velocity or groovy scriptinglanguage, a plugin system and skinability, J2EEscalability, XML/RPC remote API, Portletintegration, statistics, an RSS feed, PDFexporting, and WYSIWYG editing.