Sens'it 3 - Six sensors, a button so many possibilities
ServerSuit - ServerSuit is a browser based program that enables remote Linux administration, monitoring, website hosting, and server setup automation.
FriendlyData - Communicate with databases like a human
RedGate SQL Monitor - SQL Monitor helps you and your team find issues – before they become problems
mlsql - Infer SQL queries from plain-text questions and table headers.
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.