Visualping - Visualping is the easiest to use website checker, webpage change monitoring, website change detector and website change alert software of the web. Read more about Visualping.
MenuBar Statistics - MenuBar Statistics is a lightweight app that sits quietly in your menu bar of macOS and displays computer information such as CPU, Disk, and Network, which is updated every 5 seconds.
Distill Web Monitor - Distill is a web monitoring tool. It can monitor RSS feeds, a webpage or a part of webpage. Alerts in the form of pop-up, audio or emails can be received.
Venmon - Compact size system resources monitoring utility and multi-ping tool for Windows
Wachete - Track web page changes and get notified. Free Sign-up. Have all data in one place
Curler by Amixr.IO - Curler by Amixr.IO is a lightweight tool that lets you monitor your website uptime by checking your site once per 10 minutes and let you know if it’s working or not.