The Manual Crop module exposes a set of image style effects that enables users, if enabled in the widget settings, to crop (and scale) an image after uploading.
The project name recently changed from "manual-crop" to "manualcrop". With this change I also removed the third party jQuery plugins and added the Libraries module as dependency.
If you're updating to the new dev version (not the stable 1.4 version) you should first install the Libraries module and download the jQuery plugins (see the README for detailed instructions), afterwards you can simply replace the old module folder with the new one.
Note: Drupal 7.20 and up require the dev version of Manual Crop until a new stable version is released.
See the included README for detailed installation and configuration instructions.
Note that cropping will only be possible for image styles that have a Manual Crop effect.