Modified Hoverbox Image Gallery - This following is a modified version of Nathan’s incredible Hoverbox Image Gallery. This version uses a single image for thumbnail/larger view and partially supports :active and :focus states for keyboard only users
slideViewer - slideViewer is a lightweight (1.5Kb) jQuery plugin wich allows to instantly create an image gallery by writing just few lines of HTML such as an unordered list of images
Zenphoto - Zenphoto is an answer to lots of calls for an online gallery solution that just makes sense
Hope you find these links useful.