I have used this tool a few times and I can highly recomend it
Description
“Citrix Connection Test Tool” provides various connection methods for scalability test and other tests which require a number of sessions to be established. The tool enables testers to establish as many numbers of ICA sessions as they want by creating or duplicating session settings on Citrix Presentation Server Client.
Requirements
• Citrix Presentation Server Client
• Visual Basic Runtime or manual registration of required modules
(Please read the attached document for more details.)
Using Citrix Connection Test Tool
Using “Citrix Connection Test Tool” helps those who want to run multiple connections test to Citrix Presentation Server. With this tool you can establish the desired amount of ICA sessions from one machine in effective way so that you can measure the scalability on your testing environment.
Please read the attached document “Citrix Connection Test Tool” which describes how to use the tool.
Disclaimer
This software application is provided to you “AS IS” with no representations, warranties or conditions of any kind. CITRIX DISCLAIMS ALL WARRANTIES WHATSOEVER, EXPRESS, IMPLIED, WRITTEN, ORAL OR STATUTORY, INCLUDING WITHOUT LIMITATION WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NONINFRINGEMENT. Without limiting the generality of the foregoing, you acknowledge and agree that (a) the software application may exhibit errors, design flaws or other problems, possibly resulting in loss of data or damage to property; (b) it may not be possible to make the software application fully functional; and (c) Citrix may, without notice or liability to you, cease to make available the current version and/or any future versions of the software application. In no event should the code be used to support of ultra-hazardous activities, including but not limited to life support or blasting activities. NEITHER CITRIX NOR ITS AFFILIATES OR AGENTS WILL BE LIABLE, UNDER BREACH OF CONTRACT OR ANY OTHER THEORY OF LIABILITY, FOR ANY DAMAGES WHATSOEVER ARISING FROM USE OF THE SOFTWARE APPLICATION, INCLUDING WITHOUT LIMITATION DIRECT, SPECIAL, INCIDENTAL, PUNITIVE, CONSEQUENTIAL OR OTHER DAMAGES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. You agree to indemnify and defend Citrix against any and all claims arising from your use, modification or distribution of the code.
This tool is offered “as is” and is not supported by Citrix Technical Support
http://support.citrix.com/article/CTX107136