remote monitoring system variables?

[Stephen P. Cravey]

I'm tryign to locate a pre-existing method of monitoring FreeBSD systems. Specifically, I'd like a way to monitor sysctl variables, IPFW/PF counters, cpu and ram utilization(in that order). I can write my own interface, however I'd hate to have to reinvent the wheel if there's already something out there. Not to mention the difficulty in figuring out how to build an interface into the ipfw counters. Thanks.

-Stephen