A Mootools enhanced CSS dropdown menu, with multi-columns, icons and more.
FusionMenuA static menu system that displays 1st level and 2nd level items in the main horizontal menu and all children in the Sidebar.
SplitMenuAn option to disable the menu, allowing for normal module use of the navigation position.
Who needs a single dropdown column when you can have as many as you want? Using the built-in configurable parameters, you can make incredible multi column dropdowns.