As someone who works on accessibility tools for developers, there are a few groups and projects surrounding WCAG that have me really excited. (WCAG stands for the Web Content Accessibility Guidelines, a standard set of success criteria for meeting accessibility)
To describe the relationship (taken from my colleague Wilco Fiers, who works on both), the Accessibility Conformance Testing Task Force will focus on standardizing a format of accessibility test rules, while Auto-WCAG will continue to develop test rules according to that new standard. So all of the developer tools created for automated accessibility testing will have applicable standards, making them more consistent and reliable for both development consumers and end-users.