Dr. Link Check - Broken link checker with malware and parked domain detection
XML-Sitemaps.com - Free Online Google Sitemap Generator.
BrokenLinkCheck - Free Broken Link Checker / Online Dead Link Checking Tool - find bad hyperlinks
DYNO Mapper - Create Sitemaps with the DYNO Mapper Visual Sitemap Generator.
LinkChecker - LinkChecker is a free, GPL licensed website validator.
PowerMapper - Create visual HTML site maps and XML sitemaps for search engines of any web site quickly and easily.