Polypane - The browser for ambitious web developers that want to 5× their quality and efficiency.
CSS Peeper - Smart CSS viewer tailored for Designers.
CSS Scan - Instantly check or copy computed CSS from any element for only ~95$
Purgecss - Easily remove unused CSS
Wireframe for Figma - Lightning fast wireframing on figma (500+ elements)
Tailwind CSS - A utility-first CSS framework for rapidly building custom user interfaces.