External Accessibility Resources

General Resources

• WCAG 2.1 (includes WCAG 2.0) - www.w3.org/TR/WCAG21
• ATAG 2.0 - www.w3.org/TR/ATAG20
• ARIA Authoring Practices Guide (APG) - https://www.w3.org/WAI/ARIA/apg/
• General Checklist  - a11yproject.com/checklist.html
• Accessibility Courses List - https://github.com/accessibility/a11y-courses
• USA's 18F Accessibility - https://accessibility.18f.gov
• UK's GDS Accessibility - https://accessibility.blog.gov.uk/

Community Resources

• Drupal Slack Channel - drupal.org/slack (Join the Accessibility group)
• W3C Slack Channel - web-a11y.herokuapp.com
• Accessibility Drupal Group  - groups.drupal.org/accessibility
• Accessibility Drupal Meet-up - groups.drupal.org/search/site/a11ytalks
• Accessibility Meet-up YouTube channel - www.youtube.com/c/AccessibilityTalks
• Twitter Accessibility People/Company List - github.com/joe-watkins/top-people-to-follow-in-web-accessibility

Accessibility Tools

• Overview of Tool Types - http://webaim.org/articles/tools
• Open Source Accessibility Evaluation Tools (list) - https://accessibility.civicactions.com/guide/tools
• A11Y Style Guide -  http://a11y-style-guide.com/style-guide
• aXe Core - https://www.deque.com/axe/ (Supports Web Components)
• Accessibility Insights - https://accessibilityinsights.io/ (Supports Web Components)
• IBM Equal Access Accessibility Checker - https://www.ibm.com/able/toolkit/tools (Supports Web Components)
• Wave - http://wave.webaim.org
• Sa11y - https://sa11y.netlify.app/
• HTML Code Sniffer - http://squizlabs.github.io/HTML_CodeSniffer/
• Site Audit Tool (Can use either HTML Code Sniffer or axe) - http://pa11y.org
• Siteimprove Accessibility Checker (Chrome extension)
• Koa11y (OSX App) - https://open-indy.github.io/Koa11y

Simulators

• Funkify (Chrome extension)
• Color Blindness Simulator - http://www.color-blindness.com/coblis-color-blindness-simulator

Color Contrast

• Contrast Checker - https://contrastchecker.com
• Color Safe - http://colorsafe.co
• Tanaguru Contrast Finder - https://contrast-finder.tanaguru.com/result.html
• New WCAG 3.0 Color Model APCA (Accessible Perceptual Contrast Algorithm) - https://www.myndex.com/APCA/

Screen Readers

• VoiceOver (Built-in Apple) - http://webaim.org/articles/voiceover (Link to WebAim Article)
• NVDA (GPL for Windows) - https://www.nvaccess.org
• JAWS (Proprietary for Windows) - http://www.freedomscientific.com/Products/Blindness/JAWS
• ChromeVox (Chrome extension)