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.

Nmap - Nmap Free Security Scanner, Port Scanner, & Network Exploration Tool. Download open source software for Linux, Windows, UNIX, FreeBSD, etc.

Palo Alto Networks Panorama - Greater visibility, tighter control, less effort. Panorama™ network security management simplifies management tasks while delivering comprehensive controls and deep visibility into network-wide traffic and security threats.

Angry IP Scanner - Open-source and cross-platform network scanner designed to be fast and simple to use

F5 Advanced Firewall Manager - Stop even the most massive and complex DDoS attacks with BIG-IP Advanced Firewall Manager: advanced data center protection against layer 3–4 threats.

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.