Veeam have released a new free tool which looks pretty useful for small Hyper-V deployments, Veeam Task Manager for Hyper-V.
On a Hyper-V machine we know that the host Task Manager only shows the performance of the parent partition, and you have to use PowerShell or Hyper-V Manager to view performance of the guest virtual machines.
Veeam have combined the two in their new Veeam Task Manager for Hyper-V. It only shows you the CPU and Memory utilisation, but if you are troubleshooting performance and don’t have a big performance monitoring application in place I suspect it will be pretty useful.
Veeam official announcement: Veeam Task Manager for Hyper-V
Veeam Task Manager how-to article: http://hyperv.veeam.com/task-manager-hyper-v-announce/