Customizing MediaWiki: "MediaWiki is the popular wiki engine behind sites like Wikipedia. Its power and flexibility makes it an excellent choice for a community-driven knowledge base. The ease of developing various extensions for MediaWiki is one of the sources of this flexibility. This article will show you how to create different types of extensions for MediaWiki: wiki variables, special pages, and new tags. You'll also get a quick overview of what you'll need to do to create skins for MediaWiki."