- Link Colour Contrast Checker by WebAIM
- Accessibility Conformance Reporting Toolby W3C WAI’s Education and Outreach group
- Color tool by Google
- Accessibility Evaluation and Repair Tools list – compiled by W3C
- Paul Adam’s bookmarklets – help you look up for several elements on the page
- ASLint – a tool to check for accessibility violations on the fly
- Contrast Ratio – a nice and easy tool to calculate color contrast ratio
- Automated Accessibility Testing Tool (AATT) from PayPal Open Source
- Color Contrast Analyzer from The Paciello Group
- WAVE tool by WebAIM
- aXe Tool by Deque
- Focus order Favlet by Jonathan Avila, Chief Accessibility Officer, Level Access – displays
<tabindex>on any web page - Accessibility Checker for ePub by DAISY Consortium
- a11y Outline – a tool where developers could see how blind users see their application
