Many people and organisations are using the TclXML package family for real-world, successful projects. Following are a few that we know of. Feel free to contact Steve Ball, the project lead, to add your own success story.
It goes without saying that Explain uses the TclXML package quite extensively for delivering applications that use or manipulate XML. They use TclXML as part of a range of simple to moderately-complex Content Management Systems.
Another work-in-progress is Packaged Press, a DIY e-publishing service. Tcl and TclXML are used to provide an application framework and Web Services infrastructure, based on the Tcl Web Server.
Tcl-URL - the weekly round-up of Tcl news stories is stored in XML and processed using a combination of TclXML (expat), TclDOM and the Tcl Web Server.
Enquiries to Tcl Developer's eXchange.
Solagem Infusion uses TclDOM/libxml2 and TclXSLT for application integration.
Binary Evolution use TclXML in their Velocigen product for transforming XML into HTML.
Memory Palace is a search engine for RFCs authored in, or converted to, XML.
i7 use TclXSLT within Vignette for on-the-fly transformation of XML documents to HTML using XSL stylesheets.