JSysmon is a Java library providing access to system information like CPU or Memory usage on various platforms using native calls. It can be used to build cross-platform monitors in your applications.
System monitor is a Java library for monitoring system resources like memory and CPU consumption. The library provides unified cross-platform API for accessing system information. Currently Linux and Windows are supported via Java Native Interface (JNI).
AdaptiveCells J2EE generates test-beds for benchmarking J2EE performance. They consists of highly customizable EJB cells that can emulate CPU load, memory usage, memory leaks and exceptions. The behaviour of the cells is coordinated from a web front-end.