LinkChecker - LinkChecker is a free, GPL licensed website validator.
Dr. Link Check - Broken link checker with malware and parked domain detection
DRKSpiderJava - DRKSpider is an open source website crawler (sitemap generator) and link checker. Features:
Maplytics - Maplytics is an integration tool between Bing Maps and Microsoft Dynamics CRM to provide geographical Dynamics 365 data visualization on a map. It allows to accurately Map Dynamics 365 CRM data of customers.
Dead Link Checker - Check for broken links on any website
Passmarked - Simple, all-in-one test to check the quality of your website