Webflow University - Teaching the next generation of web design with Webflow
Interfacer - Collection of more than 200+ free design resources
Prepr.tv - Pocketable design university with a curated YouTube playlist
Facebook Design Resources - A collection of free resources made by designers at Facebook
Checklist Design - The best UI and UX practices for production ready design.
Freebiesbug - Collection of the best free web design resources.