Sysinternals Suite
Network & Admin
System Utility
Sysinternals Suite is a collection of powerful technical tools for troubleshooting, diagnosing, managing, and monitoring the Microsoft Windows operating system. Developed by Mark Russinovich and Bryce Cogswell, it provides comprehensive low-level insights into system processes, network activity, security posture, and more, making it an indispensable resource for IT professionals and advanced users.
Free
Provides deep, low-level insight into Windows internals.