Sim Daltonism is a free software application, which allows users to visualize images from the perspective of people with different kinds of color blindness. As a result, it can be extremely valuable for designers and content creators, allowing them to see the way their work will be perceived by color blind people and enabling them to make adjustments, if necessary. The software has a simple interface, with a window serving as a color blind filter, showing the effects of different types of color blindness, including deuteranopia, tritanopia and monochromacy.