FancyBox is similar to lightbox-like tools, but with kinda different image zooming script for those who want something fresh. It is powered by great javascript library – jQuery, tested with IE6, IE7, Firefox. It supports single or a group of images as other gallery scripts. Zooming in and out effects are customizable. CSS is seperated from js code to improve speed and customization. I really like the loading animation which is inside the thumbnail rather than in the center of the whole screen.

Requirements: jQuery
Demo: http://fancy.klade.lv/
License: MIT License