jqFancyTransitions is easy-to-use jQuery plugin for displaying your photos as slideshow with fancy transition effects.
AD Gallery is a highly customizable gallery/showcase plugin for jQuery.
jQuery Presentation Plugin: very easy way to create presentation in html, you can navigate the presentation by using the left & right arrows, the previous & next links, and the individual page links. The plugin is very basic.
Moving Boxes is like normal slider but difference here is that there are buttons to change panels and the panels zoom in and out.
CJ Flashy Slide Show is a jQuery Plugin That Gives Your Slide Shows Some Flash-Like Transitions
Anything Slider is a full featured slider that could be widely useful. This is the first time (on CSS-Tricks) that one of these sliders is an actual plugin as well, which should make implementing it and customizing it much easier.