Uxcel - The easiest way to learn UX/UI design
Checklist Design - The best UI and UX practices for production ready design.
uxtoast: Learn UX Design - Become familiar with design laws and learn how to use them.
UXsniff - Track user behavior on your website and improve conversions with UXsniff: the user experience watchdog that looks out for you.
Awwwards Academy - Leading thinkers teach digital talent on awwwards academy
Built for Mars - A collection of UX case studies