HTML5

• 5 Obsolete Features in HTML5
• How to Implement HTML5 Full Screen API

CSS

• 7 CSS Units You Might Not Know About
• material-ui – A CSS Framework and a Set of React Components
• Materialize, a CSS Framework based on Material Design
• Using shades for eye-catching emphasis
• Cool Image Hover Effect With Pure CSS3

General

• 199 slides on Front-end Tooling Workflows
• Mozilla Introduces the First Browser Built For Developers: Firefox Developer Edition
• The $PATH to Enlightenment
• Showcase of Website Designs with Serif Typography

Responsive

• 9 basic principles of responsive web design
• Responsive Web Design Adoption, 2014
• Rethinking Icon and Logo Design for the Responsive Web
• Responsive Images: Use Cases and Documented Code Snippets to Get You Started

UX

• Improving the Reading Experience with Content Patterns
• UI design pattern tips: auto-sharing

Sass / Less

• Sass Functions To Kick-Start Your Style Sheets
• A Few Things You Might Not Know About LESS

Accessibility

• Design like we give a damn! Accessibility W3C
• nomorecraptions – from craptions to captions

JavaScript

• The 15 Best JavaScript Charting Libraries
• Detect if browser supports base64 dataURI using JavaScript
• Micro jquery substitute for modern browsers
• gcloud-node – Google Cloud Client Library for Node.js
• vivus – JavaScript library to make drawing animation on SVG
• Remove UTM Parameters from URLs

WordPress

• A WordPress Theme Development Process
• 50 Filters of WordPress: An Introduction to Filters
• 50 Filters of WordPress: The First 10 Filters
• 50 Filters of WordPress: Filters 11-20