Here is one for "Web presence designers" - Designing for the colour-blind can be troublesome for designers who aren’t actually colour-blind.

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 Colour-blind 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 colour-blindness.

Visit http://colorfilter.wickline.org/ to access the Web Page Filters.