Epilepsy Blocker - Block flashing GIFs that may cause an epileptic seizure
Sim Daltonism - From the perspective of a color blind person, some colors are impossible to distinguish.
Color.review - Colors that look and work great for everyone.
Coblis - If you are not suffering from a color vision deficiency it is very hard to imagine how it looks...
Inclov - Worlds 1st matchmaking app focusing on people w/h disability
Colorblind Web Page Filter - Enter a URL, and this tool will render it as someone with color blindness will see it.