I am currently working on a new project for Joomlapraise called "Praisefolio". Praisefolio is a simple to use Portfolio component for Joomla. For this component I wanted a nice JS Lightbox script to display various portfolio images and I started off with the default lightbox that comes with Joomla.
After some time I found that the Joomla lightbox was too limited in it's functionality and visual appearance. So I searched the web and tried out several new scripts until I got stuck with "Greybox" made by Orangoo - a lightweight script(22kb) with lots of functionality, stunning appearance and great performance in all major browsers.
To share this handy tool more easily with you, I've made a Joomla plugin that let's you use Greybox instantly in your content items, modules, components and templates. Have fun :)