Acxmenu - multilevel jquery accordion menu.

• Very lightweight, easy to use and easy to customize.
• Pure CSS and jQuery based.
• Contains only "a" and "div" tags.
• Search engine friendly.
• Ability to indicate expanded submenus.
• Able to support any number of levels.
• Cross browser.
• Keyboard accessible using Tab and Enter.
• Keyboard accessible using Cursor Keys and Enter.
• Option for automatic sublevel indicator image which has open and closed submenu states.
• Animated open and close actions.
• Option for close previously opened submenus when open a different submenu.
• Able to embed more than one accordion menu on the page at once.
• It can 'close all' or 'open all' levels.
• Can create external links to open single panel.
• Can be used horizontally or vertically.
• Mouse access with click or mouseover.
• Separate action for header and header image click.
• Separate settings for each menu on the page:

  header image, initial expanding level, jump backwards, mouseover, speed, toggle submenu.

• It's free.