IBM Equal Access Accessibility Checker contains tools to automate accessibility checking from a browser or in a continuous development/build environment

Sa11y is an accessibility quality assurance tool that visually highlights common accessibility and usability issues. Geared towards content authors, Sa11y straightforwardly identifies errors or warnings at the source with a simple tooltip on how to fix them.

AET - a system that detects visual changes on web sites and performs basic page health checks

An accessibility checker tool for validating the color contrast based on WCAG 2.0 and WCAG 2.1 standards.

be-a11y is a Node.js-based CLI tool designed to scan and report common accessibility issues in HTML

PUXL framework is a free and open-source and eco-friendly library to create front-end Web interfaces. It helps you build accessible and responsive sites with lightweight HTML.

Browser extension that encourages accessibility awareness while using GitHub

React Axe Reporter is a UI component that displays accessibility testing results from axe-core, a popular tool for auditing web accessibility. It provides an interactive and visually appealing UI to help developers validate WCAG compliance in SurveyJS forms.

A Discord Bot that publicly "shames" those who forget to add alt text to their images. In a friendly way, of course.

Checks the color contrast of your color design based on Web Content Accessibility Guidelines (WCAG)

Apple framework for calculating color contrast ratios, WCAG conformance, and high contrast color values (UIColor & NSColor).

simplA11yMonit is a tool supporting the simplified accessibility monitoring method in Luxembourg.

The open source accessibility playbook is a resource for repo maintainers and contributors, consumers and end users of open source projects. Let’s create a future where all open source projects are inclusive and accessible to everyone.

Experiments in color contrast testing

Automated accessibility testing tool for web applications.

💀 Skeletonic CSS - A lightweight, intuitive, accessible and ultra-responsive CSS Framework to streamline your Digital and Mobile Web development needs.

Unobtrusive Accessibility Checker for Summernote WYSIWYG that uses CSS

Accessibile color generator

Lumberjack is a set of accessibility tools designed to make socializing current issues simple and motivational.

AI Accessibility Checker is a Python CLI and GitHub Action that scans frontend code for WCAG compliance (2.0–2.2, A/AA/AAA). It uses OpenAI to detect issues and provide clear, AI-driven fix suggestions for HTML, CSS, JSX, and more.