fluidGRID
fluidGRID is a CSS grid system that scales the width of your site from mobile devices to as wide as you want.
BAREHTML5
BAREHTML5 is a HTML5 based developer platform for wordpress 2.0 -> 2.9 theme development.
A new version supporting the release of Wordpress 3.0 is going to be available as soon as WP3.0 hits release candidate. While waiting you can download the old version.
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staceyHTML5
This product is in development and will be available shortly.