HTML Slidy - (ヽ´ω`)　

A new relative to Tidy, HTML Slidy is my open source presentation tool for slides written in XHTML. It provides an accessible alternative to traditional presentation tools like Microsoft PowerPoint. Best of all, there is no software to install, it just works from the Web!

ヘッダは以下

Slide Shows in <a class="keyword" href="http://d.hatena.ne.jp/keyword/XHTML">XHTML</a>

http://www.w3.org/2005/03/slideshow.html
http://www.w3.org/Talks/Tools/Slidy/slidy.js