Accessibility

Web payments

• Accessibility checklist for web developers
• ARIA from MDN
• Great Accessibility Style Guide
• Top 25 Accessibility Testing Tools for Website
• Guide on how HTML elements are supported by screen readers
• Accessible and Responsive HTML5 Video Player
• Aria in HTML

Articles and standards

• Progressive enhancement
• The extensible web manifesto
• Differences between HTML5 and HTML4 from W3C
• HTML 5.3 - Current HTML5 spec

Books

WebRTC

• HTML5: Up and Running
• HTML5 Game Development Insights
• Web Design Playground: HTML & CSS The Interactive Way
• Dive Into HTML5
• Using the HTML5 Filesystem API

Browser compatibility

WebRTC

• Can I use...
• HTML5 test
• HTML5 demos

Client side storage

Push Notifications

• Offline Cookbook
• Introduction to IndexedDB

Communications and interoperability

WebRTC

• WebRTC data channels from MDN
• What is WebRTC and how does it work

Development APIs

Cryptography

• Window.crypto
• Table of web cryptography support

File

• File API Draft
• Reading local files in JavaScript

Frame timing

• Video from google developers
• Draft from W3C

Geolocation

• Using Geolocation
• HTML5 Apps: Positioning with Geolocation

requestAnimationFrame

• Using requestAnimationFrame (CSS Tricks)
• Great article by Paul Irish

DOM Management

Shadow DOM

• What's New in Shadow DOM v1 (by examples)

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

Elements

Canvas

• Brief description from W3 Schools
• Tutorial from MDN
• Various Tutorials
• Cheat Sheet

Details

• How to Use the Details and Summary Elements
• Details element polyfill

Head

• A list of things that go in your pages' HEAD element

HTML Imports

• Introduction to HTML imports

Media Elements

• audio tag from W3Schools
• video tag from W3 Schools
• Brief description from W3 Schools
• Brief description from W3 Schools
• Brief description from W3 Schools

Sectioning

• How to Use The HTML5 Sectioning Elements

Time

• Time element guide

Game development

WebRTC

• Getting started with HTML5 Game Development from Mozilla Hacks
• HTML 5 game development video series by Mozilla
• Over 380 resources on HTML5 game development
• Info, news and tutorials
• MelonJS
• kiwi.js
• Crafty
• PhysicsJS
• cocos2d
• phaser
• Pixi.js
• Stage.js

Mobile

Push Notifications

• Privacy analysis of the HTML5 Battery Status API
• Sencha Touch tutorials
• Apache Cordova tutorial
• Best practices for mobile web apps

Multimedia capabilities

Media Capture

• Using the media capture API

Speech Synthesis

• Another useful intro
• Intro to the HTML5 Speech Synthesis API

Voice Recognition

• Web speech API demo
• Using the Web Speech API
• Experimenting with the Web Speech API
• Free voice recognition library (annyang)

Other awesome lists

Twitter

• awesome-awesomeness
• lists
• Community Curated Resources

Performance

Push Notifications

• Google developers best practices
• Prefetching and prerendeding
• Resource timing spec

Progressive web apps

Offline caching

• Instant-loading Offline-first (Progressive Web App Summit 2016)
• Offline Storage for Progressive Web Apps (article by Addy Osmani)
• The Offline Cookbook

Push Notifications

• Notifications API spec

Service Workers

• 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 Worker Libraries, Totally Tooling Tips
• ServiceWorker: Revolution of the Web Platform

Web Components

• An Extensive Guide To Progressive Web Applications
• The Business Case for Progressive Web Apps
• Intro to PWAs

Semantics

Web payments

• Semantic elements from W3Schools
• HTML5 Semantics from Smashing Magazine

Videos and Keynotes

WebRTC

• Polymer: declarative, encapsulated, reusable components
• Making the mobile web fast, feature-rich, and beautiful
• Dart: HTML of the Future, Today!
• HTML5 Developer Conference

Websites and resources

Websites

• HTML official reference
• HTML5 Please
• Keen HTML
• HTML5 Gallery

Weekly news

• HTML5 Weekly
• Mozilla Hacks Weekly Articles

Web Workers

WebRTC

• How fast are web workers?
• Web Workers in MDN