It'd be nice
A third of your visitors need glasses!
Font size conversion
A chart of font sizes stated in points, pixels, ems, percent and keywords.
Generate colors palette
Easy to use and smart idea for build a color palette
and many more again from CSS-trick.com
Creative form input field design
Cool styles and effects for button
Good example for many button styles.
CSS library for image filters like Instagram.
A tiny (<1kb gzipped!) library for recreating Instagram filters with CSS filters and blend modes.
Drupal 8 Base
Drupal 8 Base is a fresh and clean repo to begin with a new installation of Drupal 8 but with the Configuration Management based on the File and not the Database storage. It provide also a Robo build script to create a new Drupal 8 installation.
AMP and Drupal
Accelerated Mobile Pages AMP make web pages super fast on mobile