Nmap - Nmap Free Security Scanner, Port Scanner, & Network Exploration Tool. Download open source software for Linux, Windows, UNIX, FreeBSD, etc.
Azure Virtual WAN - Learn about Virtual WAN automated scalable branch-to-branch connectivity, available regions, and partners.
Angry IP Scanner - Open-source and cross-platform network scanner designed to be fast and simple to use
Cisco DNA Center - Find and resolve network issues with Cisco DNA Center. Provides software-based network automation and assurance. Control and manage intent-based networks.
Advanced IP Scanner - Advanced IP Scanner shows all network devices, gives you access to shared folders, and can even remotely switch computers off. Download it Free.
Zenmap - Zenmap is the official cross-platform GUI for the Nmap Security Scanner.