RIOT (Radical Image Optimization Tool) is designed to efficiently optimize images for the Web. Saving images for web/email/other media with the best compression ratio and quality is a difficult task. Choosing the right format then choosing the right parameters are the key factors of smaller files. With RIOT, you select optimization parameters and it shows you the the resulting image preview and the projected filesize almost in real time.
To install automatically RIOT on your LiberKey, make sure you previously activated files associations from the "LiberKey Tools" menu.
You can then open the file directly to start the installation.