Thread:Project:Support desk/Creating a Dynamic Category/Main page with Images.

I'd like to create a image-rich category page like Wiki How, http://www.wikihow.com/Category:Education-and-Communications

I'm assuming that was done with a mediawiki extension, but can't find which one. Is it DynamicPageList (Wikimedia)?

I realize there might be some proprietary css & coding done there but I'm assuming there's a base-extension they modified?

Thanks!