SuperF4 - SuperF4 kills the foreground program when you press Ctrl+Alt+F4.

ServerSuit - ServerSuit is a browser based program that enables remote Linux administration, monitoring, website hosting, and server setup automation.

Advanced Task Killer - This tool is also known as ATK. It is a tool to kill applications running.

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

Windows xKill - An App that your using Freezes, and your first thought it to CTRL+ALT+DEL to bring up Task manager...

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.