SOAP Tester?

Anyone know of any "simple" HTTP SOAP development/testing applications. I'm starting to design a SOAP web service project and one of the requirements is it must support both SOAP 1.1 and 1.2 requests. I read somewhere that CF supports SOAP 1.1. I would like to use an existing working application to generate SOAP requests in the two formats so I can dump out what CF see's and reverse engineer a service to handle both. Another option would be an existing CF app that handles both formats that I can use as a starting reference point.