A quick PowerCLI command to list all VMs in a cluster:

Get-Cluster "Cluster Name" | Get-VM

To sort by name run:

Get-Cluster "Cluster Name" | Get-VM | Sort Name

To export to a csv file run:

Get-Cluster "Cluster Name" | Get-VM | Export-CSV C:\ListVMsInCluster.csv

The commands above are very simple and because I am so forgetful I need them somewhere I can quickly find them.