Color Blindness Tools

In the challenge “Applied Accessibility: Avoid Colorblindness Issues by Carefully Choosing Colors that Convey Information”, it says

Some online color picking tools include visual simulations of how colors appear for different types of colorblindness. These are great resources in addition to online contrast checking calculators.

What are some some of the better (simpler to use) color picking tools that include those visual simulations?

My favorite is Paletton:

It has those tools.