1)   HDD Observer 2.5
Can detect a lot of hard drives troubles and give a solution for them: - Monitor hard drives health, performance and temperature; - Defragmemt and clean hard drives and registry; Show hdd activity, temperature, performance and health in tray icons

 2)   HddLed Indicator 1.00
Software tool to monitor hard drive and logical disk activity. A small indicator will blink on the screen the same way as a hardware LED on a PC. Good replacement for the hardware HDD LED when your PC case is not directly visible.