accessgarage.wordpress.com/2013/02/09/458/
This tool is a Free Vision Simulator for Chrome
accessibility.oit.ncsu.edu/tools/color-contrast/
This site provides a Colour Palette Accessibility Evaluator
This tool checks single HTML pages for conformance with accessibility standards addons.
mozilla.org/en-Us/firefox/addon/fangs-screen-reader-emulator
This tool renders a text version of a web page similar to how a screen reader would read it
This tool tests the colour contrast of a site
This website checks an entire website and evaluates its conformance with W3C open standards to quickly identify those portions of the website that need attention
This site provides a free screen reader to test your site for low vision accessibility
snook.ca/technical/colour_contrast/colour.html
This tool allows you to specify a foreground and a background colour and determine if they provide enough contrast when viewed by someone with colour deficits or when viewed on a black and white screen
squizlabs.github.io/HTML_CodeSniffer
This tool checks that HTML code conforms to a coding standard
This site provides a web accessibility evaluation tool
This validator checks the markup validity of web documents in HTML, XHTML, SMIL, MathML, etc