This Image Gallery Plus will adding image galleries to an article with a simple syntax exhibit the well-known lightbox effect, it’s allows tagging images with multilingual captions and more verbose descriptions and incorporates an image slider to display a fixed number of thumbnails per page when there are many images in a gallery. The plug-in supports image types .jpg, .png and .gif with multiple galleries per page.

Demo: http://hunyadi.info.hu/index.php?option=com_content&view=article&id=16&Itemid=10&lang=en

Download Sigplus: Free Image Gallery Joomla Plugin
http://joomlacode.org/gf/project/sigplus/frs/
http://www.box.net/shared/oobo4zmdsf