Is there a software as a service tool that will generate an XML sitemap?

http://www.web-site-map.com/xml-sitemaps.php allows a minimum of 3500 URLs, depending on server load. At the time of this writing, their current free limit is 4850 URLs.

There are multiple SaaS sitemap generator tools out there that will create XML sitemaps.  Some tools work better than others. I have found DYNO mapper (http://www.dynomapper.com) to be the best sitemap generator currently available. It is inexpensive and offers much more than just XML sitemap generation including Google Analytics integration, content audits, and other SEO analysis tools.

Actually, there are quite a few sitemap generator tools on the market that will create both XML and HTML sitemaps (I think both are equally as important). Naturally, websites are  crawled periodically by bots but this   is unpredictable, which is why a sitemap generator is so handy, to ensure that during the crawling, all pages will be identified and indexed by search engines, helping to rank your website. I've used at least ten different http://dynomapper.com/features/visual-sitemap-generatorall of which have done their job okay,   but after using this http://dynomapper.com/plans-pricing I knew I found the best one for me. It also has a slew of other features  including include accessibility testing, content inventory and content  audits as well as keyword tracking - something other tools do not offer.