Other
Here you will find all stuff that not fit into the other categories and has to do with web server, databases etc.
MediaWiki is a wiki software package licensed under the GNU General Public License. It is written in PHP and requires the MySQL relational database management system (although it has some PostgreSQL support). Historically, MediaWiki was developed to serve the needs of Wikipedia, a free wiki-based encyclopedia, but it has since become one of the most popular general wiki solutions. Today, it is used by all projects of the Wikimedia Foundation, all wikis hosted by Wikia, and many other popular and large wikis. It has also been deployed by companies as an internal knowledge management solution, and as a content management system. Notably, Novell uses it to operate several of its high traffic websites, which are not editable by the general public.
(Source http://en.wikipedia.org/wiki/Mediawiki )