Pulno - SEO Audit and Website Analysis. Pull up your SEO.
Site Visualizer Professional - Crawl website, visualize pages and links, analyze the structure of a website, build SEO reports with SQL
LinkChecker - LinkChecker is a free, GPL licensed website validator.
A1 Sitemap Generator - A1 Sitemap Generator has been in active development and sold since 2005.
BrokenLinkCheck - Free Broken Link Checker / Online Dead Link Checking Tool - find bad hyperlinks
DYNO Mapper - Create Sitemaps with the DYNO Mapper Visual Sitemap Generator.