Here is a list of 5 plugins you can use to manipulate images on client-side. This section has been taken from my eBook 51 Tips, Tricks and Recipes using jQuery and ASP.NET Controls
ImageOverlay - Allows you to display additional information in a translucent pane above an image that gracefully appears when a user hovers over the image
jCrop - jCrop is the quick and easy way to add image cropping functionality to your web application. It combines the ease-of-use of a typical jQuery plugin with a powerful cross-platform DHTML cropping engine that is faithful to familiar desktop graphics applications.
jLoupe - jLoupe adds a "loupe" or "magnifying glass" effect to images. Applying the plugin is as easy as adding the class "jLoupe" to the images you want to enable the effect on.
Magnify - Magnify allows you to easily create a "magnifier" on your images. You just need to create a small and large image which are proportionally sized, configure your markup accordingly and let Magnify do the rest
Reel - Reel is a jQuery plugin which takes an image tag and makes it a live "projection" of pre-built animation frames sequence. Its aim is to provide a 360° view of something or someplace. Like a turntable or a panorama for instance