Ever since I got my new iMac this past month, I've been immersing myself with OSX and some of its administrative tools. While I use Activity Monitor for nearly everything, I learned from this forum of other tools, like memtest, that I normally didn't work with before. I'm aware of most of the console tools (ifconfig, netstat, top, etc.), but I'd be interested in what most OSX vets use for administration tools. Any would work, from hardware test and analysis, to network mapping and firewall rules. Thanks in advance!