We often recommend the Views Slideshow module as a powerful way to create slideshows in Drupal.
However, Views Slideshow requires quite a lot of Drupal expertise. You need to understand Views, image styles and you often need some theming skills too. Our Views Slideshow class is over 20 videos long.
Nivo Slider is an alternative to Views Slideshow. It's less flexible, but is far simpler to use and looks great straight out-of-the-box.
Nivo Slider is a hugely popular jQuery slider that's been downloaded more than 2 million times. Originally designed for WordPress, it's available as a Drupal module.