1. 
   The Jquery Tool Tip
2. 
   Multi-purpose slideshow(text scroller,images scroller) jquery plugin
3. 
   Featured Content Slider Using jQuery
4. 
   script.aculo.us Side bar menu

accordion accordion menu animation navigation animation navigation menu carousel checkbox inputs css3 css3 menu css3 navigation date picker dialog drag drop drop down menu drop down navigation menu elastic navigation form form validation gallery glide navigation horizontal navigation menu hover effect image gallery image hover image lightbox image scroller image slideshow multi-level navigation menus rating select dependent select list slide image slider menu stylish form table tabs text effect text scroller tooltips tree menu vertical navigation menu