One Click Test - Tool for quickly testing your design layout in one click.
Uxcel - The easiest way to learn UX/UI design
Dimensions Toolkit - Chrome Extension for designers to test responsive websites.
uxtoast: Learn UX Design - Become familiar with design laws and learn how to use them.
AMP Templates - Beautiful, responsive AMP templates. Builder included.
Awwwards Academy - Leading thinkers teach digital talent on awwwards academy