Nielsen Norman Group
UX research, training courses and guidance for design teams
12 tools like Interaction Design Foundation, chosen by what they do. About Interaction Design Foundation

UX research, training courses and guidance for design teams

Community guide to making websites accessible

Yearly report on how the web is built, using HTTP Archive data

Guides on CSS layout that let the browser do the work

Filterable guide to WCAG 2.2 success criteria and techniques

Linux, cloud and open source courses with certification exams

Hands-on Google Cloud labs, courses and certificates

Online courses, certificates and degrees from universities

Free short courses in Python, pandas and machine learning