CodeSlider based on jQuery library and works with MooTools. Its a simple free image slideshow module for Joomla 2.5, which display your favorite images in a slideshow. The download is free. You can use CodeSlider by your agreement to GNU/GPL V2 or later.

Simple Responsive Slideshow includes a image thumb preview and is automatically resizeable to every device. Favthemes provide this free image slideshow module for Joomla 2.5 with a tutorial support. You can download it for free on developers website. Simple Responsive Slideshow is cross browser compatible to all famous browsers, like Internet Explorer 7+, Safari 4+, Chrome 4+, Firefox 3.6+ or Opera 10+.

AS ArtSlider could be your choice, if you are searching for a free widescreen image slider for Joomla 2.5 or Joomla 3.0. AS Template realized this extension by the help of jQuery. The result is a minimalist slider, which is able to display unlimited images with nice transitions effects and a included caption color palette.