Open source
The A11Y Project
Community guide to making websites accessible
Design A11y PerfCommunity accessibility guide
12 tools like Every Layout, chosen by what they do. About Every Layout

Community guide to making websites accessible

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

Online UX, UI and AI design courses with certificates

Filterable guide to WCAG 2.2 success criteria and techniques

UX research, training courses and guidance for design teams

Free online book on building your own programming language

A beginner guide to making your first pull request on GitHub

Hands-on full-stack web development workshops and courses

Free articles on modern CSS features and practical fixes

Recreate target images in the shortest CSS code possible

A browser game that teaches CSS flexbox layout step by step