browserling - Live interactive cross-browser testing from your browser.
accessiBe - Making websites accessible to people with disabilities
Meta Forensics - Meta Forensics is a website architecture, internal link and SEO analysis tool that helps identify...
Sim Daltonism - From the perspective of a color blind person, some colors are impossible to distinguish.
Dr. Link Check - Broken link checker with malware and parked domain detection
Coblis - If you are not suffering from a color vision deficiency it is very hard to imagine how it looks...