HTML5 is a markup language used for structuring and presenting content on the World Wide Web. It is the fifth and current version of the HTML standard.
The HTML Presentation Framework
JavaScript 3D library.
Simple HTML5 Charts using the <canvas> tag
A list of everything that could go in the <head> of your document
Protocol Buffers - Google's data interchange format
Video.js - open source HTML5 & Flash video player
Desktop/Android/HTML5/iOS Java game development framework
Turn any program that uses STDIN/STDOUT into a WebSocket server. Like inetd, but for WebSockets.
Best practices for modern web development
Game for learning how to code.
CSS styles for build Windows 8 Metro UI stylable interface
VNC client using HTML5 (Web Sockets, Canvas) with encryption (wss://) support.