iTop-rat
iTop is the IT Operational Portal. iTop is an Open Source web application for the day to day operations of an IT environment. iTop was designed with the ITIL best practices in mind but does not dictate any specific process, the application is flexible enough to adapt to your processes whether you want rather informal and pragmatic processes or a strict ITIL aligned behavior.
https://wiki.openitop.org/doku.php
rat is the Risk Assessment Tool and provides Critical Path Risk Analysis. It reconfigures the base iTop application to support the identification of critical paths for services, identify and docuement the risks on those paths, and suggest sensor placement to monitor the critical path.