Menus & Navigation
Light 'em Up Multi-color Mouseover Links is a multi-platform compatible script that adds different colored links to the same page that light up and underline and/or overline on mouseOver.
More Info 
Developer: CodeLifter
License: Freeware
Operating System: Unix/Linux/Windows
Lets you generate appealing menus with impressive mouseover and color-fade effects.
Developer: http://www.apycom.com/ap...
License: Freeware
Operating System: Unix/Linux/Windows
Fireworksmenu is a multi-platform compatible.
Developer: DS Effects
License: Freeware
Operating System: Unix/Linux/Windows
ross Browser Drop Down Menu is a multi-platform compatible COOLjsMenu PRO is professional version of the COOLjsMenu java script.
Developer: javascript.cooldev.com
License: Freeware
Operating System: Unix/Linux/Windows
Dhtml Trans Navi Construction Kit is a multi-platform compatible script that allows you to easily create transparent fading navis.
Developer: http://www.oktay.de/tnck...
License: Freeware
Operating System: Unix/Linux/Windows
1-click Easy Drop-down Menues is both a Unix and Linux compatible simple script that creates a drop-down menu that opens pages on a single click when selected from the menu.
Developer: CodeLifter
License: Freeware
Operating System: Unix/Linux
This applet can show a menu with the shear effect.
Developer: http://www.dseffects.com...
License: Freeware
Operating System: Unix/Linux/Windows
Layer Menu Uses External HTML Page is multi-platform compatible.
Developer: FFFast.com
License: Freeware
Operating System: Unix/Linux/Windows
Ripplemenu is a multi-platform compatible.
Developer: DS Effects
License: Freeware
Operating System: Unix/Linux
This applet can show a menu with the wormhole effect.
Developer: Dario Sciacca
License: Freeware
Operating System: Linux, Unix, Windows