Login VSI 4.1 was released today. Login VSI is used to load test virtualized desktop environments such as VMware Horizon View, Citrix XenApp and XenDesktop and Microsoft RDS. Testing such as benchmarking, capacity planning, load/stress testing and change impact prediction are all parts of Login VSI. Check out the link below for more information and to watch a video from Login VSI that describes the new features in 4.1.
Here are some screenshots of the new version. These screenshots were provided by Login VSI.