One of my clients has a confluence / JIRA system set up. They've been having some issues- outbound email gets wedged, etc. If you support a JIRA install, what do you monitor? Do you use JMX? Direct DB queries? Occasional SOAP requests to the API?
I'll be monitoring using Nagios / NRPE, but will write any needed support scripts directly, so any technology that runs on a linux box is probably fine.