I needed a carroussel photo gallery for a project. We bought the Art Sexy Lightbox 2.0 extension. This plugin works very very well.
We combined the plugin with the feature caroussel which needed some changes in the extension. The team of Artetics helped us out very quick on this and made the changes to the plugin and module in no time.
So if you need a simple wokring but efficient photo gallery plugin, and be sure you are helped by a good team, consider this plugin.