Details

I missed the XML sitemap generator that I used in a previous CMS so I built my own module to achieve the same functionality.

This module outputs an XML sitemap of your site that is readable by Google Webmaster Tools etc. I've generally found that it reduces the time it takes for new sites and pages to be listed in search engines using one in combination with Webmaster Tools etc (since you're specifically telling the service that a new site/new pages exist) so thought I may as well create a module for it.

The module ignores any hidden pages and their children, assuming that since you don't want these to be visible on the site then you don't want them to be found via search engines either.

It also adds a field called sitemap_ignore that you can add to your templates and exclude specific pages on a per-page basis. Again, this assumes that you wish to ignore that page's children as well.

The sitemap is accessible at yoursite.com/sitemap.xml - the module checks to see whether this URL has been called and outputs the sitemap, then does a hard exit before PW gets a chance to output a 404 page. If there's a more elegant way of doing this I'll happily change the code to suit.

UPDATE: As of v1.0.4 it supports the LanguageLocalizedURL module thanks to Soma.
UPDATE: 1.0.5 fixed some bugs
UPDATE: 1.0.8 adds multisite support - thanks Teppo!

Instructions

This module's files should be placed in /site/modules/MarkupSitemapXML/
How to install or uninstall modules