PDF file creation: iText

iText is a free Java class library to create PDF files.

Features:

• Barcode generation with or without fonts (Code 39, Code 128, EAN13, EAN8, UPCA, UPCE, and EAN with supplemental 5, EAN with supplemental 5, EAN with supplemental 2, Interleaved 2 of 5, Postnet and Planet)
• PDF encryption
• Headers and footers
• Absolute positioning of graphics (PNG, GIF, JPEG, WMF) and text
• Table support (see also the more advanced PDFTable class)
  
• Metadata manipulation
• HTML output
• RTF output
• Local and remote goto, destinations and outlines
• Includes tools to concat, split, create a handout and encrypt PDF files