Site Checkers

WAVE Web Accessibility Evaluation Tool
W3C – Web Accessibility Evaluation Tools List
EXPERTE Accessibility Checker

Colour Contrast Checkers

TPGi – Colour Contrast Analyser (CCA)
WebAim – Contrast Checker
WCAG Contrast checker (Firefox plug-in)
Colour Contrast Check

External Resources

WebAim
Penn State AccessAbilty – Website Accessibility
MathType for Microsoft 365: Overview – Wiris