PJ and PJX
- Parses, manipulates, and generates PDF files. Download and links to related articles. [Open Source, GPL and commercial]
- http://www.etymon.com/epub.html

ElegantJ PDF Library
- A Java class library that enables publish reports and documents in PDF format from application. [Commercial]
- http://www.elegantjpdf.com/

PD4ML
- A Java library designed to quickly add a PDF generation functionality to end products. A key feature of this library is that it uses popular HTML 3.2 as an input format. For Web application developmers PD4ML is available as a JSP taglib. [Commercial]
- http://pd4ml.com

PDFTextStream
- A Java library that specializes in extracting text and metadata out of PDF documents. Supports extraction from encrypted PDF files, and integrates with Jakarta Lucene to enable indexing of PDF document content.
- http://snowtide.com/PDFTextStream

Qoppa Software
- Provide Java based PDF tools includes: jPDFViewer integrate a PDF viewer directly in Java applications and applets; jPDFProcess is a Java library that can read, modify and then save or print PDF documents; jPDFWriter is a Java class library that allows
- http://www.qoppa.com/

DynamicPDF Generator for Java
- A Java class library for the generation of PDF documents based on dynamic data. By ceTe Software. [Shareware]
- http://www.cete.com/Products/GeneratorForJava/

PDFGo Java viewers and beans
- PDF viewing bean for applets or applications. [commercial]
- http://www.pdfgo.com/

PDFBox
- A Java class library for parsing PDF documents including PDF to text extraction, merge PDF documents, PDF document decryption. [Open source, BSD license]
- http://www.pdfbox.org/

Big Faceless PDF Library
- The libary allows to create and edit PDF documents and includes native Unicode, TrueType, Type 1 font embedding support. Documentation and examples are provided. [Commercial w/ Evaluation]
- http://big.faceless.org/products/pdf/

jPDF
- A server-side API to publish, serve and handle PDF/FPF documents. [Commercial]
- http://www.crionics.com/

JPEDAL (Java Pdf Extraction Decoding Access Library)
- An library for rasterizing and extracting content from PDF files in Java. [Open source, LGPL]
- http://www.jpedal.org/