HTML 5.3 - Current HTML5 spec Progressive enhancement The extensible web manifesto Differences between HTML5 and HTML4 from W3C
Getting started with the Web Audio API Web Audio API at MDN Making a Guitar Tuner with HTML5 Audio visualisation with the Web Audio API and React
Web speech API demo Using the Web Speech API Experimenting with the Web Speech API Free voice recognition library (annyang)
Audio and Video audio tag from W3Schools video tag from W3 Schools Tutorial from MDN Capturing audio and video in HTML5 embed tag Brief description from W3 Schools source tag Brief description from W3 Schools track tag Brief description from W3 Schools
Web Cryptography API draft Table of web cryptography support Window.crypto Cryptography next steps from W3C
Using files from web applications (MDN) Reading local files in JavaScript File API Draft File system API
Semantic elements from W3Schools Sections and Outlines of an HTML5 from MDN Document HTML5 Semantics from Smashing Magazine Lesser known semantics element from W3C & Opera
Excellent intro to accessibility from Google's fundamentals Accessibility checklist for web developers ARIA from MDN Great Accessibility Style Guide Designing for Cognitive Differences Guide on how HTML elements are supported by screen readers Top 25 Accessibility Testing Tools for Website Web Accessibility Evaluation Tools List from W3 Pa11y - automated accessibility testing Aria in HTML Accessible and Responsive HTML5 Video Player
Custom elements v1: reusable web components The power of web components Polymer project A Quick Introduction To Polymer Building web components using Polymer and ES6 classes Demythstifying Web Components HTML imports Building Webapps with Yeoman and Polymer
Intro to PWAs An Extensive Guide To Progressive Web Applications The Business Case for Progressive Web Apps
Service Worker fundamentals ServiceWorkies - Learn SWs playing a game The Service Worker Cookbook Offline content with service workers Making a Service Worker: a case study (Smashing Magazine) Service workers explained Service Worker Libraries, Totally Tooling Tips ServiceWorker: Revolution of the Web Platform
The Offline Cookbook Instant-loading Offline-first (Progressive Web App Summit 2016) Offline Storage for Progressive Web Apps (article by Addy Osmani) A Beginner's Guide to Using the Application Cache
Client-Side Storage Offline Cookbook Introduction to IndexedDB Real-World Off-Line Data Storage Local storage tutorial
Accelerated Mobile Pages (AMP) Google developers best practices Optimizing performance from Google Web Fundamentals Resource hints draft (preconnect and preload) Prefetching and prerendeding Image compression Text compression Resource timing spec
The Web App Manifest (Google's fundamentals) Field guide to web applications Apache Cordova tutorial PhoneGap from Scratch Best practices for mobile web apps Build mobile apps with Kendo UI HTML5 Vibration API HTML5 Battery Status API Privacy analysis of the HTML5 Battery Status API HTML5 Network Information API Sencha Touch tutorials
What is WebRTC and how does it work WebRTC made simple WebRTC data channels tutorial WebRTC data channels from MDN
Dive Into HTML5 HTML5: Up and Running Using the HTML5 Filesystem API HTML5 Game Development Insights Web Design Playground: HTML & CSS The Interactive Way
Getting started with HTML5 Game Development from Mozilla Hacks HTML 5 game development video series by Mozilla Info, news and tutorials Over 380 resources on HTML5 game development Opensource JavaScript game engines Pixi.js Phaser MelonJS Kiwi.js Crafty PhysicsJS Stage.js Cocos2d
HTML5 Developer Conference Polymer: declarative, encapsulated, reusable components Making the mobile web fast, feature-rich, and beautiful Dart: HTML of the Future, Today!
HTML official reference (allows collaborative modification of content like wiki) HTML5 Rocks (news, tutorials and updates) HTML5 Gallery (a showcase of sites using HTML5 markup and API's) HTML5 development guide from MDN W3C Highlights form June 2014 HTML5 Please (Know when HTML5 feature are ready to use) Keen HTML (Free interactive lessons to learn HTML) A Complete Guide to the Table Element