TinyWall - Lightweight and non-intrusive firewall
Intruder - Intruder is a security monitoring platform for internet-facing systems.
SonicWall - SonicWall security solutions protects your network, systems, users and data from cyber threats.
HackerOne - HackerOne provides a platform designed to streamline vulnerability coordination and bug bounty program by enlisting hackers.
pfSense - pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more
Nessus - Nessus Professional is a security platform designed for businesses who want to protect the security of themselves, their clients, and their customers.