TrimJunction - TrimPath - Trac
http://trimpath.com/project/wiki/TrimJunction
"TrimPath Junction is a clone or port of the terrific Ruby on Rails web MVC framework into JavaScript."
Juicy Studio: ECMAScript Menu System
http://juicystudio.com/ecmascriptmenu.asp
"To illustrate using a completely separate behavioural layer, I'll demonstrate a collapsible menu system"