Netumo - Ensure healthy website performance, uptime, and free from vulnerabilities. Automatic checks for SSL Certificates, domains and monitor issues with your websites all from one console and get instant notifications on any issues.

Wireshark - Wireshark is a network protocol analyzer for Unix and Windows. It lets you capture and interactively browse the traffic running on a computer network.

AppZero - AppZero is a monitoring and migration tool that allows users to keep track of different applications and servers in both simple and complex IT environments.

Ettercap - Ettercap is a suite for man in the middle attacks on LAN.

RedGate SQL Monitor - SQL Monitor helps you and your team find issues – before they become problems

tcpdump - tcpdump is a common packet analyzer that runs under the command line.