The Google Data Transfer Java SDK by Google provides the tools to have a Java command-line application that makes requests to the Data Transfer API. The Google Data Transfer API is a service for developers that assists with the management of transferring data from one user to another within a domain.
You-Tracker.com offers a free web service that allows websites to resize images to a specified height and width. Programmatic access to the service comes through the You Tracker Image Resizer API. The service allows users to preserve image quality percentage, aspect ratio, and can prevent enlargement. The API eliminates the need to manually resize images and users need not wait for images to load.