1)   Aspose.PDF.Kit for Java 1.7.1.0
Aspose.Pdf.Kit is a Java component for Pdf document manipulation to edit existing Pdf documents. It supports windows & web based Java applications. It also supports: Modifying AcroForm, Adding Watermark and Converting Pdf file to a Tiff or XML file.
Java, PDF, Adobe Acrobat Reader, PDF Manipulation.,

 2)   Aspose.Pdf.Kit for .NET 2.3.3.0
Aspose.Pdf.Kit is a .NET component to edit the existing Pdf documents and also supports XFA, Concatenating Pdf files, Font style, Modifying AcroForm, Adding Images & Text, Modifying Meta Information, Encrypting or Decrypting, Adding Watermark or Logo
.NET, .NET Components, PDF, Adobe Acrobat Reader, PDF Manipulation,