I use wcf test client
for testing my wcf services, but it has some shortages. Is there an alternative for WCF Test Client application with better Facilities?
Yes there is better application with much bigger feature set called SoapUI but it is not integrated with Visual Studio and its bigger feature set expect that you understand web services. SoapUI is probably leading tool for testing web services and it has free edition but it is not related to MS technologies and because of that it probably doesn't support WCF only features (like duplex, net.tcp, etc.)
Anyway if you want to have testing tool for your service there is nothing more easier then creating test (MS test, NUnit or any other framework) and simply use a proxy to test your deployed service.