ControlUp Logon Simulator

ControlUp Logon Simulator is a free tool that allows you to test access to your Citrix infrastructure by simulating a connection to your Citrix Storefront.
Citrix Logon Simulator also works through the Citrix NetScaler Gateway.

You can thus test the availability of various resources (virtual applications and/or desktops) for the desired user (even via Citrix NetScaler Gateway).

Note that Citrix Logon Simulator will test access to published resources by connecting directly to Citrix Storefront via native APIs instead of retrieving data that would be extracted from Citrix web interfaces.