Hidden pages on the site

This forum thread intends to link to all hidden pages on the website. There is nothing secret about them, I just don't know of a good appropriate place to put a link to them, and they may be too technical or incomplete to be interesting to regular players.

• Level list: Very raw bullet list of all levels, non-archive and archive (long, may be laggy!)
• Packages list: List packages that have been uploaded to the site.
• Statistics: Shows a simple combined graph showing the historical amount of levels, users and comments on principia-web.
• Sitemaps: Links to the sitemaps that exist on the site for search indexing.