SonicWall - SonicWall security solutions protects your network, systems, users and data from cyber threats.
Nmap - Nmap Free Security Scanner, Port Scanner, & Network Exploration Tool. Download open source software for Linux, Windows, UNIX, FreeBSD, etc.
HaltDos - HaltDos provides Website security with its intelligent DDoS Mitigation, WAF and Load Balancing capabilities
Angry IP Scanner - Open-source and cross-platform network scanner designed to be fast and simple to use
Rapid7 MetaSploit - Penetration testing solution for risk validation.
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.