Best server-side xml sitemap generator?

[recbrands]

I have tried xml-sitemaps which tends to crash when spidering my site(s) and requires multiple manual resumes which aren't practical for our businesses.  Please let me know if any other server-side generators that could be used on multiple enterprise-sized websites exist that could be a good fit. Image sitemaps would also be helpfu.l

+++One with multiple starting URLs would help spidering/indexing the most important sections of our sites.

Also, has anyone heard of or used Dyno Mapper?  This also looks like a good solution for us, but was wondering if anyone has had any experience with this product.

[ThompsonPaul]

What technology stack is running the websites? Most Cms-based systems have some method of building the xml sitemaps from the database, which is vastly superior to having to build it from a crawl.

P.

[recbrands]

Our company uses a custom CMS for each of our niche classified websites.  Ideally, we would like an online/cloud-based platform that would generate our sitemaps for us.  Dyno Mapper looks like a good contender, but the $108 monthly fee seems a bit steep.