HTML5 のセクションアウトラインを生成してみよう！ - IT戦記
http://d.hatena.ne.jp/amachang/20090915/1252999677
It's the HTML 5 outline algorithm in JavaScript. "javascript:(function(s){ s.src = 'http://amachang.sakura.ne.jp/misc/outline/check.js'; document.body.appendChild(s) })(document.createElement('script')) "
Lazy Sheep Bookmarklet
http://ejohn.org/apps/sheep
Lazy Sheep is a del.icio.us bookmarklet that auto-tags and auto-describes your bookmarks.