Flash set of sliding menus , whose submenus are animated by a "roller coaster" movement .
jQuery Slick Menu creates a sticky, sliding menu widget from any WordPress custom menu.
Floating Tweets allows you to quickly and easily add a floating widget, which displays the latest tweets from any twitter feed.
Yahoo slide plugin for wordpress, add a Floating Yahoo sliding chat
This plugin replaces the default more tag with a sliding jQuery hidden content functionality.
Gives a video effect to the pictures. ImageMation widget lets you put a set of sliding images with captions on any of your wordpress page/post.