Diapo slideshow is an open source project. You can suggest changes or improvements if you want. You can download it and use for free, you can also include it in your projects and sell it as part of a bigger work
Slides is a slideshow plugin for jQuery that is built with simplicity in mind. Packed with a useful set of features to help novice and advanced developers alike create elegant and user-friendly slideshows.
Skitter Slideshow is a free plugin with more than 26 animation effects and can be best used for a home page slideshow
jqFancyTransitions is easy-to-use jQuery plugin for displaying your photos as slideshow with fancy transition effects.
TN3 Gallery is a jQuery image gallery with slideshow, transitions effects, multiple album options, CSS skinning and much more. It’s compatible with all modern desktop and mobile browsers.
Pikachoose is designed to be easily installed, easy to setup, and well… all around easy. Now there is even Premium themes available to make PikaChoose really stand out!
Lately I have been doing a lot with jQuery and one item is a slideshow. Around the web you can find a variety of slideshows, all with slightly different implementations.
Making a classic slideshow, but use a different kind of transition to animate between slides. It may not fit every project, but diversity is always welcome in the world of web design.