Tigra Menu PRO is a flexible JavaScript DHTML menu solution for web sites.
EditBy: Tigra Menu PRO is flexible JavaScript DHTML Menu solution for commercial applications offering high reliability and wide browsers support. Features include: unlimited number of menus on single page all independently configurable; unlimited menu depth with all levels independently configurable. Configurable geometry, makes it possible for items to drop down the way you like it - vertical, horizontal menu, overlapping etc. All popular browsers supported.
Features

Vertical and horizontal alignment options allow to configure the menu for virtually any page layout i.e. centered, right aligned etc (demo).
Unlimited number of menus on a single page all independently configurable
Unlimited menu depth with all levels independently configurable (demo)
Configurable geometry, makes it possible for items to drop down the way you like it - vertical, horizontal menu, overlapping etc. (demo)
Any item may be positioned and sized independently (demo)
Any item may contain html (tables, pictures etc.) defined for each state independently (demo)
Frames, target windows, and tool tips are supported (demo)
Static menu positioning - both vertical and horizontal (demo)
All styles and most events supported, allowing sophisticated visual effects
Low weight and high performance (only 9.3KB)
All popular browsers supported (compatibility table)
Whole menu item area is clickable (not text caption only as in all other javascript menus)
Great free support
Reasonable price (starting from $29) you can free download Tigra Menu Pro 3.0 now.