Richard Stallman is interested whether XSLT-process, my XSLT processor and debugger Emacs interface for the Saxon and Xalan XSLT processors runs on top of a free software JDK.
As far as I know Kaffe is one such free-software implementation of a Java virtual machine. There are many other implementations listed at Kaffe's Web site.
Does anybody have any experience with any of these in a real project? How much of the JVM functionality and the associated class libraries in JDK 1.3 are implemented? Can one run an XML parser and an XSLT processor like Saxon or Xalan on top of them?