- Adds OpenType features—ligatures, kerning, and more—to Normalize.css
- simple flexible grid
- CSS3 Patterns Gallery
- New CSS gradient possibilities with the background-blend-mode property
- Simple, dynamic CSS rules to give life to your sites.
- Defines all vocabulary related to CSS
- Get all possible values for a CSS property
- Alphabetical list of CSS Properties
- SASS Mixins for IE only CSS Properties
- 3D CSS Tester
- A list of my stuff related to Sass.
- Advanced cross-browser flexbox - Dev.Opera
- Automatic Figure Numbering with CSS Counters - Codrops
- Buttons - A CSS button library built with Sass and Compass
- CSS Dashed Shadow - CodePen
- CSS Explain
- CSS Filters Demo
- CSS Modal - Modals built out of pure CSS
- CSS Values - CSS Reference, Properties and Values, CSS3
- CSS triangle generator
- CSS3 Gradient - You need one - Sure.
- CSS3 Multi Column Layout Generator
- CSS3 PIE- CSS3 decorations for IE
- CSSFlow · CSS Code Snippets & UI Kits for Web Developers
- CSSynth
- Call-to-Action Button Generator - Design buttons & download as CSS PNG
- Can I use... Support tables for HTML5, CSS3, etc
- Compile Compass into CSS
- Developer Toolkit - create CSS3 code snippets
- Flexbox Grid
- Guide to CSS support in email - Campaign Monitor
- Jeet Grid System - Smart CSS preprocessor grids
- Label.css - Label every thing!
- Layers CSS
- NTH-TEST - nth-child and nth-of-type Tester
- Pure
- Really Quick Responsive Web Design Calculator
- SVG-encoder - CodePen
- Sache- Find Sass and Compass Extensions for your next project
- Sass Style Guide - CSS-Tricks
- SassMe - A Tool for Visualizing SASS Color Functions
- SassMeister - The Sass Playground!
- Sassaparilla – Start your Responsive Web Design Projects the fast way
- Scut
- Shade - Shadow Mixin - CodePen
- Simptip- a simple CSS tooltip made with Sass
- The Ultimate Flexbox Cheat Sheet
- Tridiv - CSS 3D Editor
- atMedia.info - CSS Media Query Generator
- css2sass - Convert CSS Snippets to Syntactically Awesome StyleSheets code
- csswizardry-CSS-Guidelines
- danielguillan-modernizr-mixin
- devatrox-Sunglass · GitHub
- ericam-susy
- extractCSS - Online CSS Extractor
- h5bp-Effeckt.css
- kneath-kss