If you want a command line tool, vmrun, which is part of the VIX API (http://vmware.com/go/vix) will list the processes in a VM.
Ex:
vmrun -h myVCServer.example.com -u Admin -p password -gu GuestAdmin -go GuestPassword listProcessesInGuest "[storage1] myVm/myVm.vmx"
If you'd prefer something with a graphical interface, you can take a look at the VMware Guest Console (http://labs.vmware.com/flings/vgc).
These won't give CPU usage statistics, but you'll be able to see the names and command lines, who started them, and the process IDs.