Inqlude provides a comprehensive listing of all existing libraries for developers of applications using the Qt toolkit. Inqlude is run by the community and open for contributions.
Interaction with XMLRPC services
This library contains simple XML-RPC Client support. It is a complete client and is quite easy to use. Only one interface is exposed to the world, kxmlrpcclient/client.h and of that interface, you only need to use 3 methods: setUrl, setUserAgent and call.
A small note on authentication. If you will be accessing an XML-RPC server which uses HTTP-AUTH, simply set the user and pass in the URL. To use Digest authentication, call setDigestAuthEnabled(true).