systemd - systemd is a replacement for the init daemon for Linux (either System V or BSD-style).

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.

runit - runit is a cross-platform Unix init scheme with service supervision, a replacement for sysvinit...

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.

sysvinit - Savannah is a central point for development, distribution and maintenance of free software, both GNU and non-GNU.

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