Top Alternatives to GNOME System Monitor

Process Explorer is a powerful, free Windows utility from Sysinternals that provides detailed information about running processes, including DLLs loaded, handles open, and resource usage. It's a significant upgrade over the standard Windows Task Manager for advanced users and system administrators.

htop is an advanced interactive system monitor and process viewer for Unix-like systems. It offers a user-friendly, cursor-based interface to manage processes, providing real-time performance data and powerful process control capabilities.

Process Monitor is a powerful Windows utility providing real-time monitoring of file system, Registry, process, and thread activity. It's an essential tool for debugging, troubleshooting, and understanding system behavior.

System Explorer is a powerful yet lightweight freeware application that provides detailed insights into your computer's system internals. It functions as an advanced task manager, offering comprehensive information about processes, applications, network activity, and hardware performance, presented in an intuitive interface.

Windows Task Manager is a built-in system utility providing essential information about software and processes running on your computer. It allows users to monitor performance metrics, manage applications and background processes, and gain insights into resource usage, aiding in system diagnostics and troubleshooting.

Process Lasso is a powerful Windows process automation and optimization utility designed to enhance system responsiveness and stability. It dynamically adjusts process priorities and affinities to prevent specific processes from monopolizing CPU resources.

AnVir Task Manager Free is a powerful freeware utility that extends beyond the standard Windows Task Manager, offering comprehensive system control, enhanced process management, startup optimization, and detailed performance monitoring.

Glances is a cross-platform, open-source system monitoring tool providing a comprehensive overview of system resources and processes directly from the command line or web interface. Written in Python, it is highly portable and extensible, offering a wealth of information in a dynamic and user-friendly format.

AtMonitor was an advanced system monitoring tool for macOS, providing real-time insights into system activity, hardware usage, process performance, and network traffic. It offered both a graphical user interface and a command-line interface, catering to various user needs.

Resource Monitor is a comprehensive system utility that provides real-time insights into your hardware's performance and resource utilization, including CPU, memory, disk, and network activity. It also offers detailed information on running processes and application behavior.

SpyStudio is a powerful and intuitive API monitoring tool designed for developers, system administrators, and IT professionals. It provides deep insights into the inner workings of Windows applications by intercepting and displaying API calls, file system activity, registry access, and network interactions.

nmon is a powerful and lightweight command-line tool designed for comprehensive system monitoring and analysis on AIX and Linux systems. It provides real-time performance data across various critical areas, including CPU, memory, disk I/O, network activity, kernel statistics, and top processes, making it an essential utility for system administrators and performance analysts.