HTML5

Ian Hickson, editor of both the W3C and WHATWG.  I can only imagine that his insanely ugly website is a parody of the fact that he is the keeper of the HTML standard.

• Widgets
• Canvas
• Webforms
• Polyfill
• XHR
• Content editable
• Drag and Drop
• Web storage (local)
• Webkit (open source)

Resources:

• Official W3C
• WHAT?
• Diff
• The doctor is in.
• Cheatsheet