Want to access SOAP service from your iPhone app? The following are the open source framework that can be used.

WSDL to Objective C

Generates Objective-C (Cocoa) code from a WSDL for calling SOAP services

The project is hosted on Google code at http://code.google.com/p/wsdl2objc/

 SUDZC

This is an online service which takes in the location of WSDL file and generated SOAP artifacts for the same in Objective C.

http://sudzc.com/

 CSOAP

CSOAP is a client/server library for generating SOAP artifacts in C.

http://csoap.sourceforge.net/