Open Hardware Monitor
Open Hardware Monitor - Core temp, fan speed and voltages in a free software gadget
harddrive
PassMark DiskCheckup - SMART hard drive monitoring utility
PassMark DiskCheckup - View and monitor a hard disk drives SMART attributes and other information
Backblaze Hard Drive Stats
Hard Drive test data from the Backblaze data center. Backblaze is affordable, easy-to-use cloud storage.