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.
Vantage - Vantage is a Fire Pre-Planning and Survey Tool built with the assistance and input of actual fire responders and dispatchers.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Tim - Simple time tracker for macOS
Better Uptime - We call you when your website goes down
Zesty - SaaS marketing technology for mid-market and enterprise to create and manage websites.