1)   PDFtoolkit VCL 2.0
Gnostice PDFtoolkit is a powerful component set for Borland® Delphi™ and Borland® C++Builder™ to manage, manipulate, enhance, view and print PDF documents and process PDF eForms.

 2)   PDFWiz 1.0
Gnostice PDFWiz is a powerful Windows® application to manage and organize PDF documents. PDFWiz supports filling and reading of PDF forms, compressing, securing, appending and merging of multiple PDF documents, setting bookmarks, and much more...

 3)   PDFtoolkit ActiveX/.NET 2.0
Gnostice PDFtoolkit is a powerful component set for Microsoft Visual Studio, Microsoft Visual Studio .NET, Borland Delphi 8 .NET and Borland C ++Builder to manage, manipulate, enhance, view and print PDF documents and process PDF eForms.

 4)   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.

 5)   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