JSPWiki

homepage:=http://www.jspwiki.org/

This is a coded in::Java-based instance of::Wiki engine which uses uses::JSP and uses::Servlets.

It has been around for several years, has good code documentation, several core developers, many plugins, an active community, and features tons of unit tests. However, its age shows a bit (some refactoring would not hurt).

The native features of JSPWiki are:
 * has feature::WikiVariables

Plugin exist for:
 * has plugin for::WikiWhiteboard