I wrote my own tool (WCFStorm). These are the features:
General:
◦Dynamically invoke and test WCF Services
◦Dynamically invoke and test Web services written in any language
◦Save your opened service and its test cases into a "project" which can be reloaded anytime
◦Dynamically invoke service methods even those containing complex data types
◦UI-based, dynamic editing of complex data types
◦Test multiple WCF and Web services within a single UI.
◦Multiple-tabbed interface
◦Basic and windows authentication
◦Test services sitting behind a proxy
◦Dynamically modify the URL endpoint of a WCF or Web service.
◦Dynamically edit the service binding.
Functional Testing:
◦Create functional test cases and save it as part of a project
◦Create and save functional test cases containing Expected results.
◦Graphically compare (side-by-side) the expected results with the actual response of a service.
Performance Testing:
◦Create performance test cases and save it as part of a project
◦Graphically display charts in real-time as the performance test progresses.
◦Configurable test parameters (# of Agents, Test duration, interval etc.). You can stress out your service as much as you want.
Check out the screenshot.
(source: geekswithblogs.net)
