A round up of website accessibility resources, from data to people and companies dedicated to website accessibility.
Tenon Free to use online, one page at a time; for purchase for site audits; automated tool
WaveFree, automated, can be a browser extension; fee version for bulk pages
Axe is a free tool that is added to Lightbox or can be standalone
Funkify is free and fee, can be added as a browser extension; emulates various disabilities so that you can see the experience
These companies are agencies that offer a wide set of services including accessibility testing labs, assistive device testing and training. Some offer automated accessibility tools for software testing.