18F, the digital services agency building a better US Government through refined digital usability, clearer language, and better technology.
Plain Language, a project of Digital Gov + 18F which, in their words: "makes it easier for the public to read, understand, and use government communications."
Bad Form, a guide on making inclusive forms.
How to Make Sense of Any Mess by Abby Covert
Conversational Design by Erika Hall
Nicely Said by Nicole Fenton and Kate Kiefer Lee
Calm Tech by Mark Weiser, Rich Gold & John Seeley Brown