Wireless Network Watcher is a portable utility from NirSoft that identifies and lists all devices connected to the same network. It shows, for each detected device, the IP address, MAC address, the device name when available, the network adapter/description, and the manufacturer associated with the MAC, as well as the time of the last detection.
Main features:
Run without installation (portable file);
Quick scan of the local network and automatic updates at configurable intervals;
Option to export results in TXT, CSV, HTML, and XML formats;
Filter and mark known devices for easier reading;
Configurable sound alert when a new device is detected.
Practical use: allows you to confirm which devices are connected to your network and identify unauthorized or unknown connections.