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 jCarousel is a beautiful jQuery plugin. Personally it's one of my favorites! You can set up your caoursel up and running in just one line or two. Even theming it is easy. According to the project's page:

jCarousel is a jQuery plugin for controlling a list of items in horizontal or vertical order. The items, which can be static HTML content or loaded with (or without) AJAX, can be scrolled back and forth (with or without animation).

The only thing missing in this wonderful plugin is the RTL support. And in this tutorial, it won't miss it anymore.