This GroupDocs Documents Watermarking .NET SDK provides API access to this service. It provides a way to digitally add text and image watermarks on document formats including; Microsoft Office, OpenDocument, PDF, Email and more. It allows you to secure your sensitive documents from unauthorized access utilizing the GroupDocs.Watermark library. It also supports smart searching features to locate watermarks and remove them from documents. GroupDocs provides document manipulation APIs that allows you to view, convert, annotate, compare, sign, assemble and search documents in your applications.
Bryan Parker founded ImageFly out of necessity: "To be honest, I was fed up with having to bounce around between image libraries when I was hammering out a project. It seems like it was GD one day, RMagick the next, and something else the next." ImageFly exists to simplify image modification. The ImageFly API grants developers many image editing tools within web properties and applications.