There is also Vital Signs VM/ESA from Software Diversified Services. Although it's name implies that it only runs under VM/ESA it is running fine in my z/VM 3.1 system.
See: http://www.sdsusa.com/vsv/vsvm.htm /Fran Hensler at Slippery Rock University of Pennsylvania USA for 43 years [EMAIL PROTECTED] +1.724.738.2153 "Yes, Virginia, there is a Slippery Rock"