As you probably know, your hard drive is the most important component in your computer because it houses all your data. Unfortunately it is the most likely device to fail. While virtually all modern hard drives have S.M.A.R.T. technology built in to detect failures, one important factor you can monitor is your hard drive temperature with HDD Temperature.

HDD Temperature is a free program which, simply put, monitors and warns you when temperatures get to high on your hard drive. You can customize the temperature warning level as well as how the system responds to a tripped warning.

The free version is limited to a single hard drive, so if you have multiple hard drives in your system, or you want to monitor a server, then the pro version might be a better fit.