pgAdmin - pgAdmin Website
Pingdom - With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.
MxToolBox - All of your MX record, DNS, blacklist and SMTP diagnostics in one integrated tool.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
IBM Cloud Bare Metal Servers - IBM Cloud Bare Metal Servers is a single-tenant server management service that provides dedicated servers with maximum performance.
Better Uptime - We call you when your website goes down