multizoom.js is a easy jQuery plugin for displaying the magnified image when mouse hovers over to allow your users to get into more details.
jQuery Zoom Plugins
Hover-Zoom Extended is an updated version of Hover-Zoom, a jQuery plugin that displays your images in full size when mouse hovers over them.
AnythingZoomer is a jQuery plugin that pops up an area giving giving you a zoomed in closer look when mouse over the content.
Hover over the images and you will see an amazing thumbnail effects with zoom And sliding captions.
GS Inner Zoom is a jQuery plugin that allow you to do an inner zoom or magnifier inside an image.