jQuery CollagePlus - an image gallery plugin. This plugin for jQuery will arrange your images to fit exactly within a container. You can define the padding between images, give the images css borders and define a target row height.
Nested is a jQuery plugin which allows you to create multi-column, dynamic grid layouts. Unlike other libraries and jQuery plugins similar to Nested, this is (as far I as I’ve know) the first script out there that allows you a complete gap-free layout.