Hello to all Jenkins folks,
I'd like to inform you that for the first time, we now provide a Free Community Edition of our performance monitoring & alerting tool for Jenkins.
You can quickly get email alerts on slow Jenkins jobs, malfunctioning JVMs, overloaded Jenkins slaves; unavailable hosts; along with daily up-time charts; a graphic dashboard and many other great features.
See its dashboard:

You can monitor an unlimited number of Jenkins hosts, and it takes only 1 hour to start enjoying it :)
If you like it, please share with your colleagues - it's a free tool and I'm pretty sure they will thank you.
Regards,
Tamir Gefen, ALMtoolbox