Camera slideshow is an open source project, based on Diapo slideshow, but improved a lot. You can download it and use for free.
Camera slideshow requires jQuery 1.4+ and other jQuery plugins are necessary if you want to use some functionalities: jQuery Easing and a customized version of jQuery Mobile to use Camera with mobile devices.
Galleriffic is a jQuery plugin that provides a rich, post-back free experience optimized to handle high volumes of photos while conserving bandwidth
rlightbox is a jQuery UI mediabox that can display many types of content such as images, YouTube and Vimeo videos. It has many unique features like Panorama and Live Re-size. Like other jQuery UI widgets, it is ThemeRoller ready.
prettyPhoto is a jQuery lightbox clone. Not only does it support images, it also support for videos, flash, YouTube, iframes and ajax. It’s a full blown media lightbox. It also comes with useful APIs so prettyPhoto can be launched from nearly anywhere.
jQuery LightBox Plugin is simple, elegant, unobtrusive, no need extra markup and is used to overlay images on the current page through the power and flexibility of jQuery´s selector. lightBox is a plugin for jQuery and it was inspired in Lightbox JS.
Nivo Slider is a jQuery slider plugin with 16 beautiful transition effects, simple and flexible setup, small and semantic which is free to use and abuse .