We are looking for a C++ Soap web services framework that support RPC, preferably open source. Any recommendations?
I concur with imjorge's answer and add that there's a C/C++ version of the Axis2 framework (a more flexible, extensible Axis) that does SOAP via RPC and all sorts of stuff including a bunch of the WS-* specs.
http://ws.apache.org/axis2/c/