Zenmap is the official cross-platform GUI for the Nmap Security Scanner. It is free and runs on Linux, Windows, Mac OS X, etc. Developed by Gordon Lyon
License: Open Source
Wireless Network Watcher is a simple tool for monitoring local wireless networks and provides basic information about connected devices, making it ideal for home users. In contrast, Zenmap is a more advanced network scanning tool suited for professionals, offering extensive features for detailed network analysis and security auditing.