a graphical user interface for the PDF Toolkit (PDFtk)
A feature-rich environment for writing LaTeX documents on Windows
PDF transformation/manipulation program + library
converts PostScript or PDF files to other vector graphics formats
Cross-platform DICOM implementation
A PDF parsing, modification and creation library.
Convert HTML to PDF using Webkit (QtWebKit)
Manage your collection of PDF files
Music score editor
Command line helpers for Conexp files.