Apps to CPU Monitoring

Sidebar Diagnostics is a lightweight, customizable sidebar for Windows that provides real-time monitoring of your system's hardware, including CPU temperature, memory usage, fan speeds, and more. It's designed to be unobtrusive while keeping essential performance data readily available.

GKrellM is a highly customizable system monitor for multiple operating systems. It provides a compact, stackable interface displaying various system data like CPU load, memory usage, network activity, and more, making it a favorite for users who need detailed system insights without a heavy footprint.

Screenlets is a Python framework and collection of desktop widgets designed to enhance the Linux desktop experience with visually appealing and informative gadgets, similar to macOS Dashboard widgets. It allows users to display various system information and utilities directly on their desktop.

Conky is a highly configurable, lightweight system monitor that displays system information directly on your desktop. It is known for its extensibility and ability to show a wide range of data.

Process Hacker is a free and open-source system utility that provides in-depth monitoring and manipulation of processes, threads, and kernel objects.

Rainmeter is a free and open-source desktop customization application for Windows. It allows users to display various types of information, such as system metrics, time, weather, and RSS feeds, directly on their desktop through highly customizable 'skins'. It's a popular tool for creating personalized and functional desktop interfaces.