aXe

aXe es un sistema desarrollado por Deque para programar pruebas de accesibilidad automáticas. En Accessibility Testing with aXe and WebdriverJS se explica con detalle:

Why automated accessibility testing?
Automated testing can free up 30% of your manual testing effort, making it a valuable tool for software development. By scripting a browser to programmatically open web pages and perform user tasks, you can validate features without having to open each page yourself. By integrating axe-core into your tests, you can add coverage for accessibility without having to become an expert. In addition, you can benchmark accessibility support and catch regressions in your builds, preventing broken code from going to production.

Este sistema es similar a gulp-accessibility.