Hacker’s Keyboard for Android (yes, you can have your Tab key back!) Hacker’s Keyboard for Android (yes, you can have your Tab key back!)
Total Validator Pro (discontinued online, better than ever offline) Total Validator Pro (discontinued online, better than ever offline)
Accessibility Checker on your Windows desktop to find accessibility issues Accessibility Checker on your Windows desktop to find accessibility issues
Ace by DAISY, Accessibility Checking Tool for EPUB Ace by DAISY, Accessibility Checking Tool for EPUB