XmlRpc++ is an implementation of the XmlRpc protocol written in C++, based upon Shilad Sen's excellent py-xmlrpc library. It is designed to make it easy to incorporate XmlRpc client+server support into C++ applications and requires no other libraries.
It doesn't deal with HTTPS i.e. SSL, and the code reimplements a lot of HTTP stuff that's standard in Windows (wininet.lib)
Fast, very simple and small, had to port it to windows so there wasn't as much to have to deal with as other libraries, there was some work though. Let me know if anyone needs help getting it working in windows.