I'm sure at some point or another we've all noticed our system slowing down due to a "runaway" application using up all your CPU or memory. Then we go scrolling through the task manager to find and kill whatever that application may be, and then continue on our merry way. If you've found yourself in a situation like that then you may want to take a peek at SystemMonitor.

Core Temp is an app that true geeks sill surely love. It really only does one thing, but does it very well: it reports on the temperature of your processor, and can even grab the temperature of each individual core. A list of the supported processors (current as of September 2010) can be found below, and if yours is on the list I'd say you're in for a real treat.