smcFanControl
SpeedFan
Open Hardware Monitor
Argus Monitor
iMac HDD Fan Control
Macs Fan Control
iStat Menus
xScan
Big Meter Pro
Process Tamer
SysGauge
SSuite System Monitor
AMD64 CPU Assistant
MiTeC Task Manager Deluxe
AMD Overdrive Utility
CS Fire Monitor
smcFanControlSpeedFan - 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.
Process Tamer - Freeware Microsoft Windows utility that monitors the CPU use of applications, alerts when they use too much, and reduces their priority to keep your PC fast.
Open Hardware Monitor - Monitors temperature sensors, fan speeds, voltages, load and clock speeds, with optional graph.
SysGauge - SysGuage is a responsive software utility that monitors the memory status, CPU usage, as well as network and disk activities of your system.
Argus Monitor - Argus Monitor is for monitoring and analyzing the temperature and the health status of the hardware parts of the system.
SSuite System Monitor - SSuite System Monitor is a completely portable and stand-alone application that monitors the RAM of your system, page file load, CPU usage, and the system power in real-time.