Here is one for "Web presence designers" - Designing for the colourblind can be troublesome for designers who aren’t actually colourblind. How do we take into account accessibility when we do not suffer from the condition in hand?
Luckily, there’s a handful of accessibility “simulators” available on the web where a web page is rendered in a certain way. The Colorblind Web Page Filter takes your website and filters it as if you were colour blind.
The tool is still in development and can take some time for a render to become available for viewing. However, the range of colour filters available is fairly extensive, covering all major types of colorblindness.