I'm looking for a Paid or Free Sitemap creator with decent features. I really need it to take out sessions.
You could try my sitemap creator tool Another list of tools: http://code.google.com/sm_thirdparty.html
Try this one: Free Online Sitemap Generator. It can make a standard sitemap file for most major search engines, including google.
Those are nice but limited. Is there any paid ones being I have huge sites. On some of those the limits are 500 pages?
try xml-sitemaps.com they are very good, i always use it for all of my sites, it have both free(online,limited) and paid(very less) versions
What exactly do you mean by a huge website? Can we get an approximated page number? E.g. 100,000 pages? More?
OK, that is indeed a challenging amount Offhand, I am actually not completely sure, even with correct configuration, my software would be able to handle that. Truth to be told, I have never had the patience to test it More importantly, crawling so many pages would take a long time. If you have pages defined in a DB, I would suggest creating a script that could store sections of your website into sitemaps. Of course, that is also a strategy you can use for a crawler based sitemap generator.
While you're looking for you tools, keep in mind that there are limitations to file sizes and entry limits. There might be ways around it, but you might need a pretty sophisticated tool to accommodate the rules. http://www.google.com/support/webmasters/bin/answer.py?answer=34658&topic=8514
This one costs $49.99 and it seems to be able to cover your requirements (works for other sitemaps as well as google). http://www.brianpautsch.com/Blog/2006/9/13/GoogleSitemapGenerator/ One that is free as far as I can tell (as there is a donation option which may enable additional features - not sure as not got checking either of these 2 tools out much yet). http://gsitecrawler.com/