You can use SiteMap X, a free sitemap creator. All you need to do is to put in your web address and you will get four types of sitemaps. Besides, it will also help you upload the sitemaps to your server and ping different search engines to crwal the pages. It is worth to try. http://www.sitemapx.com/create-sitemap.h...
If you're using Wordpress, you can upload a plugin called Simple Sitemap that is compatible with Google, Yahoo, MSN, and others.
All you need to do put in your web address and you'll generate free sitemap for Google.
Here are 2 links where you can do this.
http://www.web-site-map.com/
http://www.xml-sitemaps.com/
