UptimeRobot - Free Website Uptime Monitoring
Keysmith - Create custom keyboard shortcuts for your Mac and the web
StatusPage.io - StatusPage.io is the best way for web infrastructure, developer API, and SaaS companies to get set up with their very own status page in minutes. Integrate public metrics and allow your customers to subscribe to be updated automatically.
Alfred - Alfred is an award-winning app for macOS which boosts your efficiency with hotkeys, keywords, text expansion and more. Search your Mac and the web, and be more productive with custom actions to control your Mac.
FreshStatus - Better status pages in 1-click, FREE FOREVER
Metric.live - Real-time and advanced periodic alerts for Google Analytics.