PDFtk - PDFtk is a simple tool for doing everyday things with PDF documents.
Adobe Acrobat DC - Make your job easier with Adobe Acrobat DC, the trusted PDF creator. Use Acrobat to convert, edit and sign PDF files at your desk or on the go.
AutoMetadata - AutoMetadata is a tool for exploring and manipulating metadata, document properties, and viewer preferences in multiple PDF documents.
Wondershare PDFelement - All-in-one PDF editor
Pdfinfo - Pdfinfo is a PDF document information and metadata extractor tool.
Foxit Reader - Foxit Reader is a free and light-weight multi-platform PDF document viewer.