Being a user of Camel and ServiceMix I frequently need to monitor those tools for development purposes. I mainly use JConsole to access MBeans from ServiceMix and Camel. It gives a few really helpful metrics for an ESB developer.
I also use karaf (web)console to track my route and bundles status. Looking around StackOverflow I found an interesting link that explains how to setup Hyperic HQ for ServiceMix 4: Monitoring Servicemix with Hyperic HQ.
Are they other tools you would consider worthy to learn/use for Camel/SMX Development ?
In addition we're working on a small lightweight open source web console to help visualise, manage and monitor your Camel routes called hawt.io which also has support for viewing attributes, charting, logs, JMX, OSGi and ActiveMQ with more features coming soon...