iStat Menus is a tasteful and discreet resource monitor that sits quietly in your Menu bar and monitors all of your Mac’s most important components in real time. The developer of iStat Menus says “we love easy to use, impeccably crafted little applications” and it’s hard to argue that iStat Menus is anything but that. The range of information accessible via iStat Menus is very impressive. The temperature sensors in particular cover everything from your AirPort card to battery enclosure, and even power supply. You can switch each individual element on and off via a very easy to use control center.