GeniusWiki is a new generation WIKI Java-based web application. GeniusWiki released version 3.0 under GPL2.0 license.  The highlight features include:
* Markup or WYSIWYG editor switch seamless.
* GWT based front end.
* Many advanced macros, such as Calendar, Todo list, Panels, or Tabs etc.
* Flexible and powerful fine-grind permission control.
* Full text with advance search options.
* Powerful admin platform with the utmost control.
* Easy to backup and restore.
* Easy to install and upgrade. A standalone version is one-click setup.
* Themes and Skins
* Plugins
* Many fancy features, revisions, comments, attachments, drafts management, templates and keyboard shortcut etc.
* Support most J2EE severs, such Tomcat, WebSphere, Glassfish,Weblogic and JBoss etc. 6 major database supported - MySQL, Oracle, DB2, SQLServer,Postgresql and HsqlDB.

* Reliable and stable.  It used on geniuswiki.com that runs over 4 years and hosts thousands users and spaces.
* Open source and free to use.

Free register and try Geniuswiki from official website: http://www.geniuswiki.com.
Free download from http://www.edgenius.com/download.
GitHub Home page https://github.com/GeniusWiki/GeniusWik.