XWiki

XWiki is a fully-featured wiki for the enterprise, with the ability to install and develop small applications inside wiki pages. The XWiki project offers both a generic platform for developing collaborative applications using the wiki paradigm and products developed on top of it. All XWiki software is developed in Java and under the LGPL open source license.

XWiki is similar to:

Foswiki

XWiki is used for:

Wiki

Who uses XWiki:

home user, managers

Features:

A fully-featured wiki for the Enterprise. It's also a second generation wiki offering the ability to install and develop small applications inside wiki pages.
An application to manage a farm of wikis, allowing large-scale organization and massive scalability.
The generic wiki platform offering runtime services for applications built on top of it.
A social RSS reader allowing groups to collaboratively follow information news and filter it.
A powerful yet easy to use collaboration solution, organized around the concept of spaces and their applications.