Master/node to gather and graph "everything" on your systems using Tobi Oetiker's rrdtool. It can optionally warn your surveillance software. This software package was originally called LRRD. The project. Please see http://munin-monitoring.org/
SysUnit is a JUnit framework for distributed testing, system testing and integration testing. SysUnit is ideal for testing highly distributed software such as clusters of web applications, web services or MOM based software