As clear from its name the tutorial covers the list of specially created site map plugins for Images, Videos and Mobile. The tutorial is not about the working of popular Google XML Sitemaps which everybody knows about and we have already discussed about it earlier.
The Image Sitemap plugin will generate an XML Sitemap for Images that exist in your WordPress blog.
This plugin will help you generate Google Video Sitemaps (XML) for your WordPress blog.
This WordPress plugin will generate an XML Mobile Sitemap for your WordPress blog.