If you are related to telephone exchange directory, corporate office or other legal office where PDF files use on large amount and need to manage PDF files then PDF bates tool is the perfect way to add stamps to PDF with text, logo, metadata etc.
Aspose.Pdf.Kit is a .NET component to edit existing PDF documents. You can add digital signatures or encrypt/decrypt a PDF file. It also supports XFA, adding CJK font in form field, bookmarks, XMP Metadata and adding watermark or logo to PDF.
Quick PDF Tools is a mighty box of free PDF tools - a powerful utility to preview PDF, modify PDF properties & layout. Merge PDF. Add/remove security, convert images to and from PDF and much more...
Element-IT FileMetadata .NET control provides methods to add and modify metadata for any files and folders at NTFS file system. Control uses Alternate Data Streams technology to work with metadata.
PDF Info contains many special features like removing all XMP metadata and Info data, exporting Info data to XML and importing both XML or/and XMP metadata in to a single or a batch list of PDF files.