Sitemaps are an easy way for webmasters to inform search engines about pages on your sites that are available for crawling. A Sitemap is an XML file that lists URLs for a site along with additional metadata about each URL, so that search engines can more intelligently crawl the site.

At this time Google, Yahoo and others can accept a standard developed for XML Sitemaps, where at one time, Google had its own sitemap format, Yahoo had their own version and everyone else was trying to catch up.

To make a Sitemaps XML file, we can create it manually or using an online Free XML Sitemap Generator tools, in the list below, you can find some Free XML Sitemap Generator which can help you to make it easy. You just need to enter an URL of your website, then the xml site generator will check your site and generated a sitemap xml file for you.

Description	Site Capture
xml-sitemaps
sitemapxml
sitemaps-builder

For Crawling in google search engine, google have the tools for webmaster which given the name Google Webmaster Tools and Yahoo Search Engine have Yahoo Site Explorer. In this place you can inform Sitemaps URL.