Cropper.js is a powerful javascript image cropper with cross-browser support and much more features. Also there is a jQuery plugin wrapper for Cropper.js
Features
Supports 39 options
Supports 27 methods
Supports 6 events
Supports touch (mobile)
Supports zooming
Supports rotating
Supports scaling (flipping)
Supports multiple croppers
Supports to crop on a canvas
Supports to crop an image in the browser-side by canvas
Supports to translate Exif Orientation information
