Tailwind CSS - A utility-first CSS framework for rapidly building custom user interfaces.
Design for Humans - An email course about emotional design
Tailwind CSS Play - An advanced online playground for Tailwind CSS
Simple Grid - Responsive & lightweight CSS grid for your website.
ZappJS - code generator for Node.js, Ruby, Swift, Java, PHP & more
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.