Plugin needed for selecting a portion of an image after image upload

Hi All,

I’m looking for a way to accomplish the following, perhaps via a plugin or code that I can insert –

1. I have a client’s website that has a custom post type that is heavily used.
2. The admins have a tendency to upload featured images for this custom post type that are much bigger in dimension than needed.
3. Now although we have the image sizes set in our functions.php the problem is that WordPress sets the x and y crop position as part of the add_image_size function, I wanted to know if there’s a way to select the crop position each time I upload a featured image rather than have it set as a static value.
4. Ideally, it would work like this – person uploads a large image, WP shows the image on screen, allows you to select the crop area, either by clicking or dragging handles. Once selected, then the featured image and all other image sizes get sliced.