Sim Daltonism is described as 'From the perspective of a color blind person, some colors are impossible to distinguish. Sim Daltonism lets you visualize colors as they are perceived with various types of color blindness' and is an app in the os & utilities category. There are more than 10 alternatives to Sim Daltonism for a variety of platforms, including Windows, Mac, Linux, Online / Web-based and Google Chrome. The best alternative is Color Oracle, which is both free and Open Source. Other great apps like Sim Daltonism are Colorblind Vision, Colorblinding, Coblis and Colorblind Web Page Filter.
Color Oracle is a colorblindness simulator for Window, Mac and Linux. It takes the guesswork out of designing for color blindness by showing you in real time what people with common color vision impairments will see.
If you are not suffering from a color vision deficiency it is very hard to imagine how it looks like to be colorblind. The Color BLIndness Simulator can close this gap for you. Just play around with the sample picture or upload your own images.
For users with normal colour vision the application provides real-time simulation of the common forms of inherited red-green colour-blindness
For colour deficient users the application provides colour discrimination assistance.