usability.gov
Usability.gov is the leading resource for user experience (UX) best practices and guidelines, serving practitioners and students in the government and private sectors. The site provides overviews of the user-centered design process and various UX disciplines. It also covers the related information on methodology and tools for making digital content more usable and useful.
Source https://www.usability.gov/about-us/index.html
https://www.usability.gov/what-and-why/user-experience.html
https://www.usability.gov/what-and-why/visual-design.html
Twitter https://twitter.com/usabilitygov