XWiki is a Wiki software package licensed under the GNU Lesser General Public License. It's Enterprise wiki, with many features needed for professional usage.Wikis are increasingly used internally by companies and public sector organizations, some as prominent as Adobe Systems, Intel, Microsoft and the FBI.

XWiki can act as knowledge management system, to add to or replace centrally-managed content management systems. Their decentralized nature allows them, in principle, to disseminate needed information across an organization more rapidly and more cheaply than a centrally controlled knowledge repository. Wikis can also be used for project management (allowing better collaboration) and even marketing (as wikis for customers).
Allow to glue information via quick-and-easy-to-create pages containing links to other corporate information systems, like people directories, CMS, applications, and thus build up knowledge bases.
Avoiding e-mail overload. Wikis allow all relevant information to be shared by people working on a given project. Conversely, only the wiki users interested in a given project need look at its associated wiki pages, in contrast to high-traffic mailing lists which may burden many subscribers with many messages, regardless of relevance to particular subscribers. It is also very useful for the project manager to have all the communication stored in one place, which allows them to link the responsibility for every action taken to a particular team member.
Organizing information. Wikis allow users to structure new and existing information. As with content, the structure of data is sometimes also editable by users; see structured wiki. On the other hand wiki is not strictly hierarchical which might be a disadvantage in corporate context.
Building consensus. Wikis provide a framework for collaborative writing. Particularly, they allow the structured expression of views disagreed upon by authors on a same page. This feature is very useful when writing documentation, preparing presentations and so on.
Access rights, roles. Users can be forbidden from viewing and/or editing given pages, depending on their department or role within the organization.

-- source: en.wikipedia.org

Looking & Feel design. XWiki is powerful, but its original interface is kind of raw. VSC can design the skin to align with your brand marketing.
Customization. We understand that you must have your own situation, and VSC can customize XWiki to make it seem just designed for you, for example, far better access control, brand-new categories, Web2.0 features like tag cloud, flexiable and powerful searching, multi language supporting, etc.
Integration. Based on our rich implementation experience and strong technical strength, we can integrate XWiki with your existed systems to cooperate seamlessly.