...Application/middleware usage monitoring/reporting. Focus on business transactions/use cases to help communicate with users. Small footprint, easy to use GUI and a level of statistical analysis to summarise the data.
Free Java monitoring library to easily instrument apps to measure performance detail over time with minimal overhead. Has dashboard, SVG graphs. Extends Jamon and its statistical data, same usage. http://www.e-peas.com/opensla/. JMX, SNMP planned.
'Sleepy' is a non-invasive profiler for the Windows platform that allows statistical profiling of applications through sampling the instruction pointer register. Sleepy presents results in a GUI built with wxWindows.