Algorithms and Data Structures

• Algomation: Animated algorithms
• Maze Algorithms
• Problem Solving with Algorithms and Data Structures (Python)
• VisuAlgo: Visualising data structures and algorithms through animation

Assembly

• Code as Art: Assembly x86_64 programming for Linux

Clojure

• ClojureScript Tutorial

CSS

• Bounce.js: Create beautiful CSS3 powered animations
• CSS Guidelines: High-level advice and guidelines for writing sane, manageable, scalable CSS
• CSS Triggers...
• More Transparent UI Code with Namespaces
• Positioning in Web Design
• uiGradients: Beautiful coloured gradients

DevOps

• Cloud Computing Patterns
• DevOps Bookmarks
• StackShare: Discover and discuss the best dev tools and cloud infrastructure services
• The DevOps Checklist

Go

• An Introduction to Programming in Go

HTML5

• The Offline Cookbook (AppCache)
• Web Code Tools: CSS3, HTML5, Microdata generators and much more!

Inspiration

• Beautiful Open: Beautiful sites for open Source projects
• Email Design Inspiration by HTML Email Designs
• UXPorn: User interface design patterns and wireframe templates
• uiGIFs - User interface GIFs

JavaScript

• JavaScript Application Architecture On The Road To 2015
• JavaScript Memory Management Masterclass
• LeanPub: Understanding ECMAScript 6
• You’re Missing the Point of Server-Side Rendered JavaScript Apps (Ember FastBoot)

Legal

• TLDRLegal: Software licenses explained in plain English
• TermsFeed: Privacy policy generator. Plus more

Mobile

• Building Real-Time, Multi-Platform Mobile Applications: Examples using Ionic and Firebase
• Chinese Mobile App UI Trends
• Famous Mobile Apps: Playbook to build mobile apps with Phonegap and Famo.us

Optimisation

• A Beginner's Guide to Website Speed Optimization
• Book of Speed: The business, psychology and technology of high-performance web apps

Programming (General)

• How I Start: A collection of development tutorials
• Hyperpolyglot: Programming Languages
• Syntax Across Languages

Python

• Python Practice Book by Anand Chitipothu

React and Flux

• Building interface previews (Facebook) with React by Callum Hart
• React.parts: A catalog of React Native components
• Using React.js and Application Cache for a fast, synced app
• What the Flux?
• Yo in Flux

Regular Expressions

• RegExr: Learn, build, and test RegEx
• RegViz: Visual debugging of regular expressions

Rust

• An alternative introduction to Rust
• Let's Build a Browser Engine (Toy)!

SEO

• FeedTheBot: How to follow the Google webmaster guidelines

Tips and Tricks

• DevTools Tips

Typography

• Google Web Fonts Helper: Self-host Google fonts
• Loading webfonts with high performance on responsive websites
• Typ.io: Fonts that go together
• Type Genius: Find the perfect font combo for your next project
• Typewolf: A comprehensive guide to smart quotes, dashes & other typographic characters

UX and UI

• 3.7 Blog: Ten laws to design by
• Clean Up Your Mess: A guide to visual design for everyone
• How to Design for Web Accessibility Standards
• UX Recipe: a checklist where you discover, choose and estimate your next UX project tools and techniques