The following is a list of tools that are most commonly used by Citrix Support to troubleshoot critical issues in XenApp environments. We have prioritized these tools into high and medium categories as described below:

High (without these tools proactively in place we can miss opportunities for collecting critical data):

• Downloaded, installed, and / or configured proactively

• Used for proactive monitoring and alerting

• Commonly used during critical issues

Med (These tools do not typically need to be proactively configured or running in order to capture critical data):

• Easily accessible

• Required in specific circumstances

• Commonly used during or after critical issues

Source: http://support.citrix.com/article/ctx122827