XWiki is a WikiWiki clone written in Java that supports many popular features of other Wikis like the Wiki syntax, version control, attachments, security, and searching, but also many advanced
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features like templates, database and dynamic development using the velocity or groovy scripting language, a plugin system and skinability, J2EE scalability, XML/RPC remote API, Portlet integration, statistics, an RSS feed, PDF exporting, and WYSIWYG editing. [Less]