Citrix UseClientIP Test
See http://support.citrix.com/proddocs/topic/xenapp6-w2k8-admin/ps-pub-client-ip-supply.html
This is a (very) simple console application which simply returns a list of IP addresses based on the .NET implementation of GetHostByName (System.Net.Dns.GetHostByName(System.Net.Dns.GetHostName()).
It can be used to test whether the UseClientIP feature is working, by adding the executable to the registry as described in the document. If UseClientIP is working, the application will return the IP of the ICA client, rather than the server it is being ran on.