I had been trying to find some solutions that would help convert XML to HTML / PDF / RTF. That’s when I came across Apache FOP - Formatting Objects Processor.

It’s built in JAVA & I found it to be pretty good. Apart from the input format it needs, it produces some good formats in output. The only limitation in using it is that it needs the input in the form of Formatting Objects (FO) to produce the desired output. It can also create images & PS formats along with the ones I mentioned above.

I found it to be pretty good. I would recommend to have a look at this incase you need some conversions to be done in the text formatting.

You can find more details at: http://xmlgraphics.apache.org/fop/