The company I work for, Emerge Interactive launched its free A11y WCAG Accessibility Checklist, a simple checklist based off of Luke McGrath's and W3C's recommendations. It can now be found on Apple's App Store and Google Play. This was an internal project spearheared by former coworker Joe Watkins but included most of our team. I lent my hand, especially in the development of the microsite.
Accessibility is important when only 5% of a survey of 215,942 people were deemed fully computer literate and 1/3 is can completely medium level tasks. What we design has to be digestible by all.