Dr. Link Check - Broken link checker with malware and parked domain detection
Checkbot - Checkbot will boost the SEO, speed and security of your site by checking you're following 50+ web best practices. Browser extension with free and paid plans.
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.
LinkChecker - LinkChecker is a free, GPL licensed website validator.
Passmarked - Simple, all-in-one test to check the quality of your website
Pulno - SEO Audit and Website Analysis. Pull up your SEO.