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.
ThrottleStop - ThrottleStop is a lightweight application that was designed primarily for people who use their computers plugged into the wall and do not use the battery.
iMac HDD Fan Control - iMac HDD Fan Control is an HDD fan control for the Mac operating systems by using which the Mac users can control the speed and noise of the fan of the Mac.
WinTools.net - Is a suite of tools for increasing MS Windows operating system performance. WinTools.
smcFanControl - [Download] smcFanControl 2.
AMD Ryzen Master - AMD Ryzen Master is a powerful and world’s first multi-threaded CPU overclocking software that supports the latest AMD AM4 socket Ryzen processors, helping you unleash your system’s true potential.