Appreciating Libxslt
http://www.xml.com/pub/a/2005/08/03/libxslt.html

DuCharme, Bob
XML.com
2005

Abstract:

The two most well-known XSLT processors are probably the Apache project's Xalan (available in both a Java and C++ version) and the Java-based Saxon, which was written by XSLT 2.0 specification editor Michael Kay. If those are the only two XSLT processors you currently use, it's worth checking out Daniel Veillard's libxslt.