Resources

Guidelines & Standards

WCAG 2.2 Quick Reference - Official success criteria and techniques
Accessible Design Principles - Key concepts from W3C
Bitcoin Design Guide - Accessibility - Community resource for Bitcoin UX
WAI-ARIA 1.2 - Accessible Rich Internt Applications
APCA - Accessible Perceptual Contrast Algorithm
EN 301-549 - Accessibility requirements for ICT products and services
ISO 9241-171 - Ergonomics of human-system interaction Part 171: Guidance on software accessibility
QT Accessibility - Documentation for developing accessible QT apps, like Bitcoin Core’s QT User Interface

WAI ARIA Authoring Practices Guide - Design Patterns and Examples
Scott O’Hara Code Abode - Curated list of Accessibile Components, Styles, etc.
shadcn/ui - Accessible component library for React built on Radix with support for Tailwind CSS

NVDA (Windows) - Free and open-source screen reader for Windows
VoiceOver (macOS & iOS) - Built-in screen reader on Apple devices
TalkBack (Android) - Built-in screen reader for Android devices
JAWS (Windows) - Commercial screen reader with advanced features for Windows
Orca (Linux) - Free and Open-Source Screen Reader for free and open desktops that use Assistive Technology Service Provider Interface (AT-SPI)

Screen Magnifiers: ZoomText and built-in browser/system zoom tools for users with low vision
Speech Input: Dragon NaturallySpeaking and native voice control features on iOS, Android, Windows, and macOS
Alternative Input Devices: Switch controls, eye tracking systems (like Tobii), and keyboard-only navigation setups for users with motor impairments
OS Accessibility Settings: Built-in tools like VoiceOver, TalkBack, Magnifier, Sticky Keys, and color contrast adjustments on major operating systems

TPGi Colour Contrast Analyzer (GPL) - Analyze color contrast ratios for text and UI elements
APCA Contrast Calculator (W3C License) - Perceptual contrast algorithm for modern UI color systems
Who Can Use - Website contrast tool
Color Review - Website contrast tool
Siege Media - Website contrast tool

a11y-tools – Ian Lloyd - Curated directory of accessibility checkers, simulators, color tools, and bookmarklets
Equalify.App (GPL) - Open Source automated accessibility auditing tool
axe DevTools (MPL 2.0) - In-browser accessibility scanner by Deque
ARC Toolkit (Proprietary - Free) - Chrome extension for quick accessibility audits by TPGi
WAVE Extension (Proprietary - Free) - WebAIM’s browser extension for evaluating web accessibility
Lighthouse (Apache 2.0) - Chrome DevTools audit for performance, SEO, and accessibility
WCAG-EM Report Tool (W3C License) - Helps create structured WCAG conformance evaluation reports
Equal Access Toolkit (Apache 2.0) - IBM’s framework and resources for inclusive design

Accessibility Scanner (Android, Proprietary) - Google’s manual testing app that suggests accessibility improvements in Android apps already installed on your device
Android Accessibility Inspector App (GPL) - Front-end for connecting to and displaying the accessibility node tree provided by the Accessibility Inspector Service
Accessibility Test Framework for Android (Apache 2.0) - Framework used in Espresso and Robolectric to automate accessibility checks during Android app testing
Xcode Accessibility Inspector (Proprietary) - Apple’s macOS tool for inspecting and debugging accessibility in iOS and iPadOS apps
Google Play Console Pre-Launch Reports (Proprietary) - Automated pre-release testing service that includes accessibility checks for Android apps

Accessibility Insights (MIT License) - Microsoft’s suite for accessibility testing on web and Windows

eslint-plugin-jsx-a11y (MIT License) - ESLint plugin that surfaces accessibility issues in JSX during development
Pa11y (MIT License) - Command-line tool and dashboard for automated accessibility testing
jest-axe (MIT License) - Jest matcher that integrates axe-core for unit testing accessibility
cypress-axe (MIT License) - Integrates axe-core into Cypress end-to-end test flows
axe-playwright (MPL 2.0) - Playwright integration for automated accessibility scans using axe-core
HTML_CodeSniffer (BSD License) - Client-side script for identifying WCAG violations in HTML
The A11y Machine (MIT License) - Automated tool that crawls websites and checks them for accessibility issues

AI Model Accessibility Checker (AIMAC) - Open Source tool to evaluate accessibility of LLM generated code

Hocus Focus - A keyboard navigation horror game that teaches accessibility through challenge
The Accessibility Maze - A simulation game where you navigate the web with different disabilities
Flex Box Froggy - A CSS game to learn flexbox behavior for responsive design

FOSS a11y tools come with a range of licenses:
MIT, GNU GPL, MPL, Apache 2.0, W3C Software License, etc.

Got a tool or resource we should list? If you’d like to contribute to this guide or have questions about implementing these principles Open an issue.