Xalan is an XSLT processor for transforming XML documents into HTML,
text, or other XML document types. It implements the W3C
Recommendations for XSL Transformations (XSLT) and the XML Path
Language (XPath). It can be used from the command line, in an applet
or a servlet, or as a module in other program.

WWW: http://xml.apache.org/xalan-j/