The Scalable Unix Tools (SUT) is a collection for managing workstation networks as a MPP. These include programs for looking at all of the processes in a cluster and performing operations on them (such as attaching the debugger to every process you own that is running a particular program). This is not part of MPI but can be very useful in working with workstation clusters. An MPI version of these tools is available at www.mcs.anl.gov/sut; this implementation works well with the ch_p4mpd device of mpich.