SystemInformer

SystemInformer (formerly Process Hacker) is a free, open-source advanced task manager and system monitor. It gives you deeper visibility into what Windows is doing than any built-in tool, making it ideal for debugging, security research, and performance analysis.

• Process tree — visualise parent-child process relationships; instantly see which process spawned which.
• Real-time per-process graphs — CPU, memory, disk, and network usage graphs broken down per process, not just system-wide totals.
• DLL & handle inspector — see every DLL loaded and every file, registry key, mutex, and pipe that a process has open.
• Network connections per process — view active TCP/UDP connections mapped to the owning process, with geolocation support.
• Memory map viewer — inspect and dump memory regions of any process — useful for security research and debugging.
• Service & driver management — start, stop, pause, and configure Windows services and kernel-mode drivers from one interface.