Nuntius is a free platform-neutral (for now support for Apache ODE is only available) WS-BPEL broker which allows you to track messages exchanged within your WS-BPEL processes. Nuntius extends WS-BPEL process definition and adds a special invocation context and logging constructs which allow gathering exchanged messages and quality and performance indicators without the need of modifying external Web Services.
Nuntius 0.6 offers a feature (the most important feature from a business analyst perspective) of visualising computed quality and performance scores. Nuntius offers you a rich set of statistical views, including tabular data, pie charts, history pie charts, line charts, and history line charts for process instances and all theirs operations.