DeveloperSpace
an accessibility (a11y) visualization toolkit
This CSS file intends to warn developers about possible risks and mistakes that exist in HTML code. It can also be used to roughly evaluate a site's quality by simply including it as an external stylesheet.
Identifies accessibility issues in your React.js elements
Color utilities for macOS, iOS, tvOS, and watchOS
Ace by DAISY, an Accessibility Checker for EPUB
CSS Accessibility Validator for your HTML
Calculate the WCAG contrast ratio between 2 colors.
Fractal component library tool (http://fractal.build) plugin for accessibility testing against Tenon (http://tenon.io)
EIII accessibility testing bookmarklet