Antenna House XSL Formatter
XSL formatting engine that conforms to XSL W3C recommendation. [Commercial]
Big Faceless Report Generator
Java Report Writer to convert XML to PDF. Creates dynamic reports with JSPs and Servlets. Features include encryption, bar codes, graphs and charts, custom fonts, Unicode support. [Commercial w/ Evaluation]
FOP
XSL-FO to PDF converter. A part of Apache's XML project [Open Source, BSD-like].
XEP
XSL-FO to print (PDF or PostScript) converter written in Java. [Commercial]