Uxcel - The easiest way to learn UX/UI design
SendView - The best way to track your competitors' email marketing.
uxtoast: Learn UX Design - Become familiar with design laws and learn how to use them.
Owletter - Keep an Eye on Your Competitors' Newsletters
Awwwards Academy - Leading thinkers teach digital talent on awwwards academy
Competitors App - Competitors App helps marketers monitor their competitors' marketing moves in one place, with very little time investment.