Accessibility for designer: where do I start? by Stéphanie Walter - UX Researcher & Designer.
Stéphanie has gathered a goldmine of goodies:
Articles, resources, checklists, tools, plugins and books to design accessible products
Library: Accessibility resources, guides, communities, and more
A very comprehensive directory of accessibility resources.
Related links
A Complete Guide To Accessible Front-End Components — Smashing Magazine
Vitaly has rounded up a whole load of accessibility posts. I think I’ve linked to most of them at some point, but it’s great to have them all gathered together in one place.
Useful accessibility resources
A whoooole bunch of links about inclusive design, gathered together from a presentation.