Motherboard Monitor!

The Open Hardware Monitor is a free open source software that monitors temperature sensors, fan speeds, voltages, load and clock speeds of a computer.

AIDA64 is a system information, diagnostics, and auditing application developed by FinalWire Ltd., that runs on Windows, Android, iOS, Windows Phone and Tizen operating systems. It displays detailed information on the components of a computer. Information can be saved to file in formats such as HTML, CSV, or XML.

SpeedFan is a program that monitors voltages, fan speeds and temperatures in computers with hardware monitor chips. SpeedFan can even access S.M.A.R.T. info and show hard disk temperatures. SpeedFan supports SCSI disks too.

Conky is a free, light-weight system monitor for X, that displays any kind of information on your desktop. Originally a fork of Torsmo, Conkys torsmo-based code is BSD licensed. New code in Conky has been licensed under the GPL 3.0.

Core Temp is a compact, no fuss, small footprint program to monitor CPU temperature.

Real Temp is a temperature monitoring program designed for all Intel single Core, Dual Core, Quad Core and Core i7 processors. Each core on these processors has a digital thermal sensor (DTS) that reports temperature data relative to TJMax which is the safe maximum operating core temperature for the CPU. As your CPU heats up, your Distance to TJMax will decrease. If it reaches zero, your processor will start to thermal throttle or slow down so maximizing your distance away from TJMax will help your computer run at full speed and more reliably too. »

3C Toolbox is the comprehensive toolbox to save battery, tweak, tune, backup, secure and monitor any Android devices running any ROMs, any kernels.

Ashampoo HDD Control 2 provides complete monitoring of your hard drive(s). The software supports not only all common IDE and serial ATA hard drive(s), but also provides improved support for external USB hard drives and solid state drives (SSDs).

Computer diagnostics, hardware monitoring, network audit, and benchmarking.

This little application displays system information on your desktop in a similar way to some other desktop information tools. Unlike others, this application looks like wallpaper but stays resident in memory and continues to update the display in real time. Uses very little memory and nearly zero cpu. Perfect for quick identification and walk-by monitoring of production or test server farms. Everything is customisable including language.

EPU-6 Engine is a program for managing the power-saving profiles. A few preset profiles to choose from can be found and you can adjust the settings. You can select one of the three preset models for the CPU fan in the BIOS of Asus mainboards.The ASUS EPU provides total system power management by detecting current PC loadings and intelligently moderating power in real-time. It automatically provides the most appropriate power usage for the CPU, VGA card, hard drives, and CPU/chassis fan - helping save power and money! »

Corsair Link Dashboard software allows you to monitor your system and gives remarkable control over your case fans, lighting, and compatible Corsair power supplies and Hydro Series liquid CPU coolers that work together for optimal cooling and performance.

CPU Thermometer is one free CPU temperature monitor; it can help you monitor your computer CPU temperature in live time. Program can start with Windows start-up, and show live CPU temperature in your desktop tray icon, so you get this important system information at a glance. This is one completetly freeware, easy to install and easy to use. CPU Thermometer will show CPUID, Frequency, Core Number and CPU current temperature. Program provide some useful functions, when the CPU temperature over some value that you set, it can "Show warning message", "Shutdown computer" or "Reboot computer." »

Cysboard - A lightweight system monitor similar to conky with html and css for themes