Caption

jq-tiles is a jQuery slider plugin with css3 transitions and many effects.  

dbpasCarousel is another jQuery carousel plugin. This plugin will convert the ul element into a carousel. And you can set the auto generating captions for each slide by using img alt attribute.  

jQuery PicTip is a plugin that adds handy tooltips to your images, slideshows, sliders and more.   jQuery PicTip - Features: Easy configuration and customization Easy integration with slideshows, sliders, 360 views, and more Support for captions and bubble tooltips Add any content type to tooltips/captions Event type options (hover/click) Change tooltip position relative to spot Create spots with your own HTML markup CSS transitions/Animations are supported  Very small in size   

Rondell is a jQuery plugin for displaying galeries and other content the way you want.