CPU-Z is a freeware system profiler (system monitor) application for Microsoft Windows (for all versions from 95 on) that detects the central processing unit, RAM, motherboard chipset, and other hardware features of a modern personal computer, and presents the information in one...
Rainmeter allows you to display customizable skins on your desktop, from hardware usage meters to fully functional audio visualizers. You are only limited by your imagination and creativity.
The Open Hardware Monitor is a free open source software that monitors temperature sensors, fan speeds, voltages, load and clock speeds of a computer.
There has not been any code change since December 2020, also the community now wonders if it is abandoned: https://github.com/openhardwaremonitor/openhardwaremonitor/issues/1471 There also seems to be a fork called LibreHardwareMonitor (which is already listed as an alternative) and appears to be the most active fork right now.
HWiNFO are professional hardware information and diagnostic tools supporting latest components, industry technologies and standards. Both tools are designed to collect and present the maximum amount of information possible about computers hardware which makes them suitable for...
Speccy is an advanced System Information tool for your PC, available as installer version and as portable version in 24 languages. It does a quick scan of your machine and gives you a complete rundown of every piece of gear that's in your computer.Discontinued
The latest version is from May 2018 https://www.ccleaner.com/speccy/version-historyBundleware
The installer propose you to install additional third party software like Google Chrome
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.
SidebarDiagnostics - A simple sidebar for Windows desktop that displays hardware diagnostic information.
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.Discontinued
The developer promised new versions, but the program seems to be no longer updated. Latest version, 4.52, released in June 2016, can be still downloaded from the official website.
Neofetch is a command-line system information tool written in bash 3.2+. Neofetch displays information about your operating system, software and hardware in an aesthetic and visually pleasing way.