Open Hardware Monitor - Monitors temperature sensors, fan speeds, voltages, load and clock speeds, with optional graph.
PowerTOP - PowerTOP is a Linux tool to diagnose issues with power consumption and power management.
SpeedFan - Hardware monitor for Windows that can access digital temperature sensors located on several 2-wire SMBus Serial Bus. Can access voltages and fan speeds and control fan speeds. Includes technical articles and docs.
RMClock - RightMark CPU Clock Utility (RMClock) is a small GUI application designed for real-time CPU...
HWiNFO - Professional System Information and Diagnostics. Comprehensive Hardware Analysis, Monitoring and Reporting for Windows and DOS. FREEWARE. download. Advertisements.
upower - UPower is an abstraction for enumerating power devices, listening to device events and querying...