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Dr. Link Check - Broken link checker with malware and parked domain detection
A1 Sitemap Generator - A1 Sitemap Generator has been in active development and sold since 2005.
LinkChecker - LinkChecker is a free, GPL licensed website validator.
Octopus.do - Build your website structure in real-time and rapidly share it to collaborate with your team or clients. Start prototyping websites or apps instantly.
BrokenLinkCheck - Free Broken Link Checker / Online Dead Link Checking Tool - find bad hyperlinks