At my company I had to do a review
of some products for exporting XML
from Quark:

These products and their companies are:

ATTD (Apropos Toy and Tool Development) - http://www.attd.com
    XPress XML and Roustabout
    
Noonetime - http://www.noonetime.com
    XML Xtract

Quark - http://www.quark.com/products/avenue
    Avenue.Quark

Publishing Connections, Inc - http://www.pcipage.com
    iCPS

The report is here:
http://www.stratagem-systems.com/papers/xpressoverview/Section1.html

It was written some time ago and may be a bit out of date.

Bernard Harrison
Technical Director
Stratagem Systems
www.stratagem-systems.com

 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list