iPulse
This is iPulse. If you have a mac and read any cool sites, you've already heard about it.
So what do I have to add? Nothing. But I did buy it. Sure, $9.95 may be a bit much for a system monitor utility, especially when it doesn't show you anything you can't get from a few command line utils. But it is such a mac app. It was done so well, I felt compelled to pay for it. I've never really considered myself a sucker for aesthetics, but I guess in this case I made an exception.
