Passmarked - Simple, all-in-one test to check the quality of your website
Sim Daltonism - From the perspective of a color blind person, some colors are impossible to distinguish.
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.
Coblis - If you are not suffering from a color vision deficiency it is very hard to imagine how it looks...
Dr. Link Check - Broken link checker with malware and parked domain detection
Colorblind Web Page Filter - Enter a URL, and this tool will render it as someone with color blindness will see it.