Fluid Squares is a mobile-first, HTML5 fluid grid framework whose units remain square and uses CSS3 Media Queries.
The Lotus Poetry is a HTML5 game that eschews the traditional shoot-em-up or siege-style games for a charming and spiritual approach.
jQuery Timelinr is a quick and easy way to show items on a timeline in an intuitive way.
Kendo UI builds on HTML5, CSS3, JavaScript and jQuery to provide a simple UI Framework with widgets, touch-enablement, and good browser support. Beta available for free now.
The Evolution of the Web is a data visualization built with HTML5 to show the interaction between web technologies and browsers on a timescale.
Simple and elegant video player that uses HTML5 <video>. Supports multiple skins, great compatibility, and lightweight.
HTML5 Boilerplate turns 2!
Mosaiqy is a jQuery plug-in that uses HTML5 to show images in an animated mosaic.
DONUTâ„¢ - Radial Navigator is a donut chart tool built on HTML5. It is interactive and has some nice animation elements to it.
It was only a matter of time. Hobo with a Shotgun and HTML5 <canvas>.
The good folks at Speckyboy are making a single-page scrolling portfolio template available for free that uses HTML5 semantic tags and CSS 3 styling.
If you are a big fan of HTML5 like I am, show it with this fun poster.
CSS3 Generator gives a visual generator for CSS3 stylings. Manipulate the stylings, see the preview and get the resultant code easily.
Good article on improving game performance in HTML5 using the dom.
Cuepoint.js is a plug-in which allows you to add cue-points and subtitles to HTML5 using the <audio> tag.
"Buzz is a small but powerful Javascript library that allows you to easily take advantage of the new HTML5 audio element. It degrades properly on non-modern browsers."