階層メニューとか

www.dhtmlgoodies.com - tab menu
http://www.dhtmlgoodies.com/scripts/dhtmlgoodies-tabmenu/dhtmlgoodies-tabmenu.html

List based DHTML menu
http://www.dhtmlgoodies.com/index.html?whichScript=dhtmlgoodies_menu2

デザインCSS-Based Navigation Menus: Modern Solutions | Smashing Magazine
http://www.smashingmagazine.com/2007/03/14/css-based-navigation-menus-modern-solutions/

WEB制作者のための32個のブックマークまとめ（part2）*ホームページを作る人のネタ帳
http://e0166.blog89.fc2.com/blog-entry-185.html

lightWindow Demo
http://www.stickmanlabs.com/lightwindow/

Dynamic Ajax Tabs in 20 Lines | 20bits
http://20bits.com/2007/05/23/dynamic-ajax-tabs-in-20-lines/