The VMware OS Optimization Tool helps optimize Windows desktops for use with VMware Horizon View.
I/O Analyzer is a virtual appliance solution for storage performance measurement for large scale ESX clusters deployment.
vCenter Cluster Performance Tool is a Powershell script that uses vSphere PowerCLI to obtain performance data for a cluster by aggregating information from individual hosts.
vBenchmark is a simple application that allows you to measure key datacenter operational and efficiency metrics. Simply connect to your vCenter Server hosts and the application provides a snapshot of these metrics for your entire virtualized environment.