Here is the brief summary of its features:
It has no limits for the number of pages included in sitemap
It generates any kind of sitemap you require:
Text formatted sitemap
With optional extras:
Images information can be optionally included in sitemap
It will work for all sites including dynamic websites such as portals, blogs, forums, and online stores.
Fast and easy installation onto the same host that should be crawled
Support of LARGE websites, dividing the sitemap on the parts per 50,000 URLs each and creates a Sitemap Index file according to the Google sitemap protocol.
Informs (ping) Google and other search engines automatically when sitemap generation is complete
Any broken links that are detected by the application are reported on a special page, providing you with the URLs pages that refer to these bad links enabling you to fix them and keep the search engine robots on your site.
Can be setup automatically with a cron job to create sitemaps without any user interaction