User Inyerface - A painful illustration of bad UX
Befront - Learn UX/UI design skills in practice with bite-sized tasks
How I Experience Web Today - Realistic web search experience
Frontend Mentor - Supercharge your front-end skills by building in a real-life workflow. Solve real-world HTML, CSS and JavaScript challenges whilst working to professional quality designs.
Checklist Design - The best UI and UX practices for production ready design.
Learn Mobile Design - A curated list of mobile design resources