Resize images on upload to defined maximum dimensions, saving space and bandwidth. Watermark images automatically upon upload or manually via Media Library (Professional extension)

Watermark PDF (FKA WaterWoo) allows WooCommerce site administrators to apply a custom watermark & password to a simple PDF upon sale.

WP-Colophon gives you the ability to add a Digital Colophon into the unobtrusive WEB_AUTHOR meta tag.